Because of the fast-acting way that nutrients can be provided to your plants via foliar application, this also makes it effective for providing your crops with boosters and stimulants when they need them. There are a wide range of products out there, most of which require foliar feeding as the method of application.
Avoid spraying when it is too hot or too cold. In hot temperatures, your plant’s stomata (the pores in the leaves) will be almost closed, making a foliar spray much less effective. On the other hand, when it is too cold, spraying could promote fungal growth. Spraying early in the morning can be best since this allows your plants to dry during the day, reducing the risk of mould.
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.
When you spray, spray the entire plant – in particular the undersides of the leaves. There are at least two good reasons for this. Many pests, such as spider mites and other aphids are often located on the leaf undersides. This is also where more of the stomata are located.
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.
There are two main types of sprayers available that you can use for foliar sprays; both types are useful depending on the circumstances.
Not all growers may be familiar with it, but most will at some point encounter a scenario where they should apply a foliar spray to their cannabis plants. The reasons for this are various; from treating your plants with insecticides or fungicides, to addressing a nutrient deficiency in the fastest way possible.
The other types of sprayers are garden pump sprayers. These come with different capacities and a shoulder strap so you can carry them around easily while attending to your plants.
Neem oil has the advantage of being a natural insecticide that also has some fungicidal properties. Cannabis growers use a neem oil foliar spray together with aloe vera juice and some type of emulsifier like potassium silicate to dissolve the oil. Weekly sprays during the vegetative phase can strengthen plants and increase their resistance against pests and pathogens.
Learn about how and why to foliar feed your cannabis plants. What makes foliar spraying so effective and how do you get started?
A great tip is to use a foliar sprayer that can be adjusted to expel a fine mist. Again, the finer the mist, the better it will be for the plant to absorb. There are also spray bottles that can be used upside down, which is great for getting into tight spaces and spraying the bottom of leaves.
So, let’s have a look at the dos and don’ts of foliar feeding in the vegetation and flowering stages of your plant’s life.
If you are growing in an environment with a powerful artificial light source, the last thing you would want to do is to cover your plant in a liquid while the light is on. The plant cannot absorb the freshly sprayed liquid fast enough.
So, the next time you grow, consider using the secret way in to help take your plants to the next level.
Foliar sprays are a great way to tackle nutrient deficiencies. For example, if your plant starts to show signs of calcium and magnesium deficiency while you are running a nutrient-rich feeding regime, you could look to use a cal-mag foliar spray at lights off every five days to rectify the issue. This way you don’t have to change your standard feeding regime.
Cover the plant’s leaves and stem with a light spray. Remember, less is always more as your plants need to absorb all this liquid before the lights come back on. If the leaves are dripping wet, you have used too much. It may take you a few attempts to get it right.
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This is especially useful if there are multiple plants in your system and only a few are showing signs of a deficiency. The deficient plants can be directly treated with a foliar spray without jeopardizing the other plants feeding schedule.
The first thing that’s going to happen is that the liquid will act as a lens, amplifying the heat from the lights and burning the leaf. Second, the plant will choke. Usually, when a plant gets too hot, its stomata open to release heat, gas, and water to cool down. However, it will not be able to breathe or self-regulate if the leaf is covered in a liquid that is causing its surface to burn.
A commonly overlooked method used in vegetative and flowering stages is foliar feeding, which is the act of spraying nutrients directly onto leaves.