What is Powdery Mildew?

Plants are constantly exposed to the elements. Rainfall, irrigation and sunlight all play a part in diseases and how to control them. Powdery mildew forms on plants when the plant is dry, there’s little light and there is high humidity. During late spring, early summer when the weather is cool & humid is when plants …

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Spider Mite Infestations

How do you know if you have spider mites? Spider mite infestation can look innocent in the beginning. Some yellow leaves, a little wilting so you add some water and give it more light. But before you know it your plant is covered in webbing and you plant is dying – fast. Spider mites are …

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Spider Mite Infestations

How do you know if you have spider mites? Spider mite infestation can look innocent in the beginning. Some yellow leaves, a little wilting so you add some water and give it more light. But before you know it your plant is covered in webbing and you plant is dying – fast. Spider mites are …

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Spraying 209 at T&A

Invasive pests cause up to 40% of viable crops loss yearly. Leaving farmers to destroy their stock and later dealing with disease spread by pests. Common Pests in Crops: Aphids White Flies Leaf Miner Mites Cutworms Earwigs Lygus Bugs Maggots Thrips Fungus Gnats Root Aphids Larvae Plants are constantly exposed to the elements. Rainfall, irrigation …

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How to use liquid fertilizer

Most potted and garden plants have no chance to develop without fertilization. Here, soil ecosystems are inadequate for growth. Using artificial nutrients is therefore necessary to make up for the lack of certain minerals. Effective fertilization requires knowledge, which is difficult for beginners in gardening. What is liquid fertilizer? Liquid fertilizer is a suitable solution …

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When to apply weed killer

When it appears there are more weeds on the lawn than the grass itself and you can’t remove them manually, weed killers come to the rescue. However, when deciding to use a weed killer for grass, vegetables, flowers, or any other plants, know that the application of each of these substances requires the utmost care. …

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What is Pesticide Resistance

Living organisms by definition are not homogenous. The species constantly evolve, including your vegetable and fruit plants. Therefore, it is crucial to understand what your plants are and aren’t resistant to. Pesticide resistance is the natural and transmissible capacity of certain plants to survive exposure to this pesticide product. How can it be explained that …

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SNS offers is lineup of weed killing products including:

Weedrot so highly effective because it does what the name implies, it destroys the weeds from the root up. It kills not only the roots, but the rest of the plant aboveground too. Weedrot eradicates weeds that often grow back easily and quickly.

Weeds appear almost everywhere–mostly in large quantities that are not easy to eradicate. They take away space, sun, and nutrients that are essential for the care and survival of cultivated plants. They cause them to weaken and linger, or even die.

The fight against weeds is therefore an unavoidable part of growing your crop. It is usually a long fight and requires a lot of patience, effort and the use of special equipment and weedkillers. In this article, you will find out how long does it take weed killer to work.

How Long Does It Take Weed Killer to Work?

The lawn is not just a recreational area as beautiful and dense grass is the showcase of your garden. But if your garden grows with weeds, the effect is reversed.

Weeding is an effective and ecological way to control weeds on the lawn. Unfortunately, it is a labor-intensive and very energy-consuming method. Instead, you can spray the grass with products that fight the problem for you. Discover how long it takes for each weedkiller to kick in so that you can choose which method works best for you.

Organic or contact herbicides? Choose the right spraying for weed killers!

Organic herbicides that act on the leaves and stems of the plants to be treated are the best. The effects of spraying appear after just one week. On the other hand, herbicides that are absorbed by weed roots are not as recommended. The first effects take about 2 weeks to see. In addition, these chemicals stay in the soil for a very long time and their cleaning is nearly impossible as a result. This can unfortunately have a negative impact on future cultivation at this location.

Contact herbicides destroy only those parts of the weed that are in direct contact with each other after spraying. These agents are very effective if the spraying is thoroughly covered with weeds. They break down on contact with the soil and require a more precise spraying as well as better sprayers. These sprayers are also not as accurate and long-lasting as system herbicides. However, what makes them attractive is that the first effects are already visible just a few hours after spraying.

How Long Does It Take for Roundup to Work on Plants?

Roundup is the trade name of herbicide–a weed control agent in crops–produced by Monsanto. It is a weed control agent designed to be used with GMO crops designed to be resistant to the primary chemical, Glyphosate, which has been proven to be carcinogenic in multiple studies. Recently, Monsanto lost three different law suits regarding Roundup’s relation to causing cancer in the form of non-Hodgkin’s lymphoma.

The preparation is taken by the leaves of weeds and then moved to the roots of the plants, causing their extinction. The first symptoms of weed control are visible 7-14 days after the treatment. The plants die out after about 30 days. High temperature and humidity and strong sunlight accelerate the effect of the preparation. The preparation does not stay in the soil as it is moving and quickly decomposed by soil microorganisms. As previously stated, Roundup is cancer-causing, so we highly recommend avoiding this dangerous product.

Each weed killer has a different chemical structure

Herbicides are chemicals with complex chemical structures. Although each product has its own unique properties, weedkillers within the same family have similar chemical structures and many common characteristics.

Non-selective products are total weed killers, while selective products kill only certain weeds. Products in these two categories can be contact or organic herbicides. They can act in the soil at the root level or directly on the leaves.

weed killers supplies plant plants outdoor tools
  • Foliar contact herbicides are absorbed by the leaves and burn them. The roots may not be controlled.
  • Foliar organic herbicides are carried into the plant after penetration through the leaves. They destroy the entire plant including the root.
  • Root organic herbicides are absorbed through the roots and migrate throughout the plant.

Weed control with Sierra Natural Science

This weed killer product is so highly effective, it destroys not only the above ground parts but also the roots of plants. Thus, it is used to destroy the weed that grows back easily and quickly around a plant.

Sierra Natural Science is widely used in agriculture and horticulture. It is used before sowing, before the crop is grown in the east, or just before harvesting. There are no restrictions of use for genetically modified and resistant crops.

Our weed killer is also used to destroy unwanted plants on sidewalks, driveways, or paths. It controls individual plants with great precision.

Beware of the phenomenon of accustoming

The need to optimize agricultural yields has always driven humans to use chemicals. The use of herbicides has very quickly become established in current crop and garden practices. In the case of a single, widespread application, plants develop resistance to the herbicide over time. This is resulting in a loss of efficacy of the herbicide as it’s an accustoming phenomenon.

Preserve Yields With Weed Killers For Plants

To preserve yields, farmers tend to increase herbicide rates. This type of weed control introduces chemical species that can be harmful to both the environment and to humans. This is the case of glyphosate. Its use as an active molecule was developed during the design of Roundup in the 1970s by John Franz, a researcher at Monsanto.

Degradation of Herbicides As Weed Killers for Plants

Herbicides degrade more or less slowly in ecosystems. A low persistence implies the repetition of treatments. Conversely, a high persistence generates long-lasting effects in the environment. Their bioaccumulations are dangerous for all living organisms through food chains, including:

  • Water
  • Soil
  • Animal fats
  • Plant tissues

How does Glyphosate work to control weeds around plants in your garden or lawn?

Glyphosate herbicides are absorbed through the leaves of the plants. Once on the leaf, the chemical prevents the production of a plant-specific enzyme as the plant needs it to survive. This enzyme is only found in plants, which is why glyphosate is non-toxic to animals and humans. Because the organic matter and clay in soils absorb glyphosate strongly, it is very unlikely that seeds, germinants, or roots will absorb glyphosate residues. Forest plant communities can therefore regenerate quickly after treatment operations.

Glyphosate herbicides are non-selective. They are systematically spread throughout the plant once they have penetrated the cuticle. However, as these products are usually very water soluble, they do not penetrate the waxy cuticles well. Instead, a detergent must be added to improve transfer through this protective barrier. Once in the plant, glyphosate works by inhibiting a very specific enzyme. The plant needs it to synthesize essential amino acids.

weed killer grow gardening outdoor plants control

Restricted-entry interval (REI) after a weed killer treatment

The restricted-entry interval (REI) is the smallest period of time that must elapse between the time a pesticide is applied to an area or crop. It includes the time period during which people can move around that area without protective clothing or equipment.

Its purpose is to protect people and animals from pesticide poisoning. That could occur if they enter a treated area too soon after application of the pesticide. This is especially the case if they do not wear proper personal protective equipment.

All Sierra Natural Science products have a 0-Day REI, including our Weedrot weed killer product line. That means you’re getting the safest possible product, while still effectively killing weeds.

How can you get contaminated?

A person can come into contact with a pesticide in many ways. In general, post-application exposure to pesticides can occur through:

  • Inhalation of spray fumes, powders or mists.
  • Dermal contact with residues.
  • Eye contact with steam, powder or mist, or by rubbing your eyes with your hand, glove or clothing contaminated with pesticide residues.
  • Ingestion, such as eating food that has been treated or eating without first washing your hands.

Some herbicides may come in contact with the skin if you touch treated plants. This often happens while performing other activities such as weeding, thinning or brushing. Workers in a field may also lift residues that have accumulated on plants or on the ground in the form of a powder. This powder is then deposited on the workers’ skin and/or inhaled. People walking in treated areas may also breathe in vapors from a recent pesticide application.

Avoiding exposure to these residues is not always as easy as you might think. Beware of spraying neighboring properties as, on windy days, sprayed pesticides can drift surprising distances! If you smell solvent and/or see residue on the foliage of the plants you are handling, you should leave the area. Once you’re safe, make sure to ask the farmer if he or she has sprayed recently.

weed killer plants control mulch homemade weed

What are the factors that influence the restricted-entry interval (REI) after a weed killer treatment?

Different types of herbicides will need different post-application safety periods. Each pesticide may need the use of one or more restricted-entry intervals. These periods are established by taking into account the following:

  • The toxicity of the active, poisonous ingredient of the herbicide.
  • The composition of the residues after application of the product, when the latter is a mixture.
  • The composition of the herbicide formulation itself.
  • The conversion of the chemical to more toxic compounds under certain environmental conditions.
  • The concentrate levels and method of application.
  • The characteristics of the plants to which it is sprayed
  • Weather conditions
  • The type of operations carried out after application of the pesticide.

If more than one pesticide has been applied at the same time, then the longest restricted-entry interval must be respected.

Loss of efficiency of herbicides in cold and wet conditions

Today, many commercially available herbicides have recommendations for the interval between application and the next rain to ensure good performance as a weed killer. This interval is often referred to as the rainfastness period. This characteristic is usually based on good growing conditions.

Under poor conditions, it is possible that the required interval may be longer. For many herbicides, rainfall shortly after application may reduce the activity of the herbicide.

How long does it take weed killer to work in Spring on garden plants?

Conditions are always unpredictable in the spring, so it can be frustrating for growers trying to implement an effective weed control program. It’s a proven fact: cold, wet weather can affect herbicide performance.

Sierra Natural Science brand agricultural herbicides work well in a wide range of temperatures. Better weed control is usually achieved when applications are made at 60-75°F and maintained for a few hours afterwards. At this temperature, most plants are actively growing and are not under heat stress.

At temperatures below 60ºF, plant growth slows down, thus slowing down the absorption and translocation of the herbicide. In such a situation, the time required to avoid rain entrainment is extended. Symptom development is delayed, but overall weed control performance is not compromised.

plants homemade weed control
Food Vegetables Bed Cultivation Raised Bed Garden

A frost that occurs soon after an application of a herbicide may also affect results. If a light frost is forecast, then you should have a window of at least 2 hours at over 50ºF to allow the product to penetrate the plant. When the temperature rises the next day, the translocation will begin again. If a severe frost is expected immediately after application, then you should avoid proceeding. If plant injury occurs before the product has been dispersed, then weed control performance may be reduced.

Other rules for herbicide use

Before gardening and applying each herbicide, you should first familiarize yourself with:

  • Its use
  • Recommended doses
  • Protective and precautionary measures

Our advice is to not use more active substance than recommended in the instructions for use.

Recommended doses depend on the strength of the herbicide and the degree of weed infestation. The recommended standards from an ecological point of view should also be strictly adhered to. 

When spraying weeds, remember that some plant protection products work very quickly, but only briefly and superficially. Others work slower, but much longer and more accurately. Some destroy selectively, while others destroy everything that is sprayed with them. The choice therefore depends solely on the situation and the current needs.

To learn more about the SNS Weedrot product line, please visit our page to discover why its the best organic weed killer on the market.


Hydroponic cultivation takes place in water. Combined with the right fertilizers, it gives fantastic results for plants. The main advantage is that plants grow and ripen much faster. This is because the water solution is delivered directly to the roots.

To achieve this, it is necessary to maintain water in hydroponic nutrients systems at a constant level. Plants are like us: they need a regular supply of minerals to grow well. That is to say, not too many and not too few minerals.

What minerals do plants need to grow well? How do you know if the dosage is right? Can hydroponics be done without a nutrient solution? You are about to find out the answers to all these questions about Hydroponic nutrients in this blog post.

Plant growth takes place thanks to photosynthesis, which occurs in the leaves. During this photosynthesis, glucose and oxygen are produced from carbon dioxide and water. One more very important factor is part of this equation: the sun’s radiation.

In simple terms, the reaction looks like this: 6CO₂ + 6H₂O →C₆H₁₂O₆ + 6O₂

Do you see any soil component here? Well, there are none. The only things that you can find are:

  • Light from the sun
  • Carbon dioxide from the air
  • Water from precipitation and ground deposits

Other hydroponic nutrients are also required for healthy plant growth. Among them are:

If we got rid of these soil elements completely, our plant would grow just as well or even better. That’s how we came to a fundamental feature of hydroponics: water cultivation.

nutrient grow

What is Hydroponics? Is it a good organic gardening solution?

Cultivation in hydroponics is a water based type of plant cultivation. It is a tillage without soil to help plants grow. It has been replaced by a mineral material that is chemically inert and does not affect the development of the plant. It only serves to fix the roots.

To promote proper growth, the plants take up the mineral salts dissolved in the water. The hydroponic nutrient solution is supplied directly to the root area. As a result, no permanent substrate is needed.

In hydroponics you can grow virtually any type of plant. It provides everything you need for plant life so that your plants grow well.

What do you feed an organic plant?

Well, if not in the ground or a garden, then where? After all, something must stabilize the plant. The best nutrient solution for hydroponic crops are so-called inert substrates.

This substrate is devoid of mineral components, but only passively allows the roots to overgrow and keeps the plant in place. Among those inert substances we can name:

  • Mineral wool
  • Coconut fibre
  • Perlite
  • Vermiculite
  • Cotton wool

What is important is that such a substrate is not conducive to the development of soil pathogens.

The composition of this hydroponic nutrient solution can be very precisely adjusted to the requirements of a given species. What’s more, the nutrients are available there in a fine-molecular, water-soluble form. Therefore, they are easily accessible to the plants. This is done so that the roots take them up practically without any effort.

Basics of Water-based Cultivating

Ordinary tap water can be used in hydro crops, but it must be stored for at least 48 hour–this time is needed for the chlorine contained in it to oxidize. The latter negatively affects plant health and its ability to grow.

Tap water–even if it is left out–has a pH factor of about 7.5 – 8.0. It is far too high for growing in water, so in this case it is necessary to use a product that reduces the pH of our solution.

To avoid problems and complications, it is recommended to use distilled water to grow. It is completely free of any compounds and mineral salts. It has a pH of about 7.0. After you add fertilizers to hydroponics, it should be reduced to an appropriate level. If this does not happen, then you must lower the pH of your solution.

Also remember to keep the water temperature ambient so that your plants grow in the garden. The water should not be too cold or too hot. It is best to keep the temperature between 70-80°F.


The pH measures the degree of acidity of the substrate. When properly regulated, it allows optimal assimilation of nutrients by the roots. In hydroponic cultivation, the substrate used is more acidic than the soil. In addition, the nutrient solutions and fertilizers used also tend to increase acidity.

The basic factor for successful cultivation is to keep the pH value of the aqueous solution constant and consistent to ensure plants grow. The best solution pH for hydroponic cultivation varies between 5.5 and 6.5 and should not be exceeded. It is best to keep your pH level around 5.8 and you should check the pH level as often as possible. If you notice changes, then you should bring them back to normal as soon as possible.

If you plan to transfer more plants to hydroponics, we recommend buying a pH meter to ensure your plants grow properly. And if you just want to see if semi-hydro is for you, then there are solutions available on the market to measure the pH. You will also find solutions for lowering and increasing the pH, as well.


The water solution should not have access to light. The container in which the water solution is contained should be made of a material that does not send light.

Direct contact between water and light may cause algae to grow and develop. Therefore, it is important to make sure that the right temperature is maintained. It is also essential to check that the water does not have access to light. This ensures that your solution is not threatened by algae growth.

The water solution in your tank should be replaced systematically–that is, on average, every week or two. It is necessary for your plants to always get fresh mineral components to grow properly. These are needed for proper development. You can measure the nutrient content with an instrument called an EC-meter.

vegetable solution

What’s Electroconductivity for?

Electroconductivity (EC) measures the concentration of mineral salts dissolved in water. The EC must therefore increase when the plant’s nutrient requirements are higher.

An excessively high EC indicates an excess of nutrient salts in the roots. Drainage must then be improved and the nutrient solution should be regulated. This can be done–for example–by diluting the solution with osmosis water instead of tap water.

The EC of the solution should be about 1.2 to 1.6 to 2.0. This depends on the fertilizer manufacturer and the need of the plant. The EC of the solution should always be 1.2 at the beginning of the cultivation and should grow over time.

The perfect nutrient for hydroponic plants

The nutrient solution is the “food” of the hydroponically grown plant, since it cannot be found in the soil. The nutrients contained in the tap water are enough. There is a mix of three macronutrients that form the core of any fertilizer or nutrient solution.

1) Nitrogen

Nitrogen is involved in plant growth and metabolism. This makes the plant strong and healthy. The greenery in our homes are particularly sensitive to nitrogen deficiency. This can be due to overwatering or due to an excess of another nutrient. When the plant lacks nitrogen, its growth is delayed or stopped, and old leaves turn yellow and fall off.

2) Phosphorus

Phosphorus stimulates the roots and facilitates photosynthesis. Thanks to phosphorus, nutrients are well distributed throughout the plant. This allows it to flower and produce fruit. In the event of a deficiency, the plant remains small and stiff, with leaves that take on a dark tint on the tips. Cold and humidity are worsening factors. This mainly affects flowering plants.

3) Potassium

Potassium facilitates the control and efficient use of water by the plant to grow well. It also plays the role of regulator of several vital functions:

  • Resistance to disease
  • Resistance to cold and drought
  • Photosynthesis
  • Regulation of evapotranspiration
  • Potassium deficiency is observed by a soft bearing, leaves with browning or even tense edges.


The soil contains mineral salts which dissolve and are taken up by the plant during watering. The substrate mix–whether liquid or in a powder form–is chemically inert and has no effect on plant develo

3-Part Fertilizer System

Benefits of using our 3-Part Fertilizer System

  • Blended with our in-house distilled Alfalfa Extracts
  • Promotes vegetative and structural growth
  • Promotes strong roots
  • Safe around children & pets when used as directed

How our 3-Part Nutrient System works

  • This 3-part Nutrient System (Grow, Micro, & Bloom) are a combination of primary nutrients (NPK), blended with our in-house distilled alfalfa extracts that help stimulate growth for higher yields at lower cost. Grow Nutrient Formula promotes vegetative and structural growth, along with strong roots. Micro nutrient formula adds trace elements such as calcium, magnesium & iron and helps sustain a plant’s health and vigor. Bloom Nutrient Formula stimulates the bloom phase of flowers, buds or fruit.
  • Grow nutrient formula is made up of natural botanical extracts highly water soluble. We process raw certified organic botanicals and herbs in-house, ensuring oils and terpenes have a consistent potency across all of our products. The botanical extracts are all food grade GRAS (generally recognized as safe) materials, that are fully biodegradable, and not toxic to animals. It is exempt from EPA registration under minimum risk pesticide exempted under FIFRA section 25(b). It can be used on a wide variety of plants, fruits, and vegetables.

Where to use our fertilizers

  • Home & Gardens
  • Hydroponics
  • Greenhouse
  • Agriculture

Mixing Compatibility

  • Mix Grow with Micro, Bloom 604A, 604B, 209
  • Grow formula may be applied separately or in conjunction with most pesticides and with other fertilizers. The addition of wetting agents often enhances nutrient uptake. DO NOT use with basic metal sulfates, strongly alkaline materials (such as hydrated lime and lime sulfur), or spray oils. A compatibility test is recommended. Tank mixtures with copper-based products can be phytotoxic due to increased solubility of copper. Before general applications, apply the spray solution to a small test area of the foliage to determine any undesirable phytotoxic effects

How to mix our Fertilizers

  • Soil & Coco–Mix .25 oz. per gallon of water. Pour solution on soil and drench surround areas.
  • Hydroponics–Mix .25oz per gallon of water. Pour solution over roots & drain into the system. Flush system after use.
  • SHAKE WELL BEFORE MIXING. Always add Grow Nutrient formula to fresh water first and stir well, then add other nutrients or pesticides. Never combine Grow Nutrient with other nutrients or pesticides in undiluted form; doing so may cause nutrient lockout making some minerals unavailable during the budding and flowering cycle. Do Not Spray Under Direct Sunlight or Grow Lamps. This product should be used as part of a complete nutrient program. This product is concentrated to the limit of solubility. Protect from freezing and direct sunlight. If crystallization occurs, mix entire contents with an equal amount of hot water and double the amount used.