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best foliar spray for cannabis

Best foliar spray for cannabis

Well, the main reason growers foliar feed during this stage of growth is usually to treat a nutrient deficiency such as Potassium/Phosphorus, to treat an aphid infestation or to cure fungal diseases such as White Powdery Mildew which can ruin a crop if present during the flowering stage.

Remember to foliar feed when the lights are off, preferably in the morning, a feed of strong nutrients coupled with bright overhead lights can cause the water droplets to be magnified and cause your leaves to burn.
It’s only recommended that you foliar feed until about 2 to 3 weeks into flowering.

If your aim is to correct a nutrient deficiency, then you should be using nutrients that are specially created for soil or hydroponics as these contain higher levels of micronutrients which are ideal for foliar feeding.
In most cases, you should always mix the nutrients at a quarter to half the strength labeled on the bottle to avoid nutrient burn.
Foliar feeding essentially means that you spray nutrients directly onto the leaves of your plant. This provides nutrients via foliage rather than the roots.

  • Increase airflow and lower temperature/humidity.
  • Spray with a fine-mist spray bottle.
  • Mist at least once per day in the early morning, preferably an hour before the lights come on.
  • Make sure that you are using soil or hydro nutrients, packed with micronutrients for maximum benefit.
  • Mix nutrients at 25 – 50% of their described strength.
  • Spray the entire cannabis plant.
  • Stop misting 3 weeks into the flowering stage.

Cannabis will secrete a sticky resin to act as insulation for when the environment is hot and dry, this helps to keep the plant cool and locks in essential moisture.

High humidity during flowering can lead to stunted bud development, a loss of resinous oils and odor as well as the increased risk of fungal diseases such as White Powdery Mildew or bud-rot which thrives in high humidity and can devastate a crop.

Foliar Spray During Flowering? Should I Foliar Spray During Flowering? Foliar feeding is an excellent way to provide vital minerals and essential nutrients directly to your plants

Best foliar spray for cannabis

Always follow the safety instructions. Some commercial sprays may be safer to use than others, but you should always follow the guidelines for safe use. You obviously don’t want to spray potentially harmful substances without adequate protection such as gloves, a face mask, and protective eye gear. Make particular note of how safe the product is to spray on something that you will consume after harvest. Some commercial insecticides or fungicides may work great for ornamental plants, but they can be harmful if not outright toxic for vegetables and of course, for your precious weed! So always read and follow the instructions carefully before you spray.

There are two main types of sprayers available that you can use for foliar sprays; both types are useful depending on the circumstances.
In addition to speed, foliar feeding has also other positive effects. When the plant is taking in nutrients via its foliage, this causes it to give off more carbohydrates into their root zone. This is beneficial for the microorganisms in the growing substrate that help assist with nutrient uptake.

Test your spray first to ensure that your plants won’t get irrevocably damaged. Rather than going full-out and spraying your entire crop with an untested product you just got from the internet, perform a test on one single leaf first. Wait for a day to see whether the application caused any damage before moving forward with a full feeding regimen.
The best time for foliar spraying is either early in the morning or late in the evening. Do not spray in direct sunlight. The sunlight can not only burn your plants through the “lens effect” from droplets on the leaves, it can also degrade active substances and nutrients contained in your solution. In the evening, the plant’s pores are fully open, which allows for a quicker intake as compared to during the day. If you grow indoors, the best time to spray is at the beginning or the end of the dark period.
While foliar spraying (or foliar feeding) your plants doesn’t really require any special growing skills, it can nevertheless be helpful to know how to do it right so you can get the best results. Let us take a closer look at foliar spraying; what it is and when you want to use it.
Avoid spraying during flowering. Spraying the buds can be bad for a number of reasons. Depending on your spray solution, this can lead to anything from a spoilt taste to an increased chance for mouldy buds.
Take note of the recommended nutrient strengths of your solution. Most of the time, foliar feeding requires a much lower nutrient strength than feeding your plants through soil. If the product that you are spraying doesn’t specify the proper amount for foliar application, start with half the recommended dose.

A foliar spray provides a fast and effective way to address nutrient deficiencies. It is also the most common way to apply insecticides and fungicides. Learn more about foliar feeding and how to use it to your advantage.

Learn about how and why to foliar feed your cannabis plants. What makes foliar spraying so effective and how do you get started?