Many commercially available growing mediums will already have perlite added. If not, you can add your own. It is common to add between 10-50% by volume of perlite.
Perlite is heat-treated volcanic glass. It is used by cannabis growers to improve the quality of the grow medium as it guarantees proper drainage and aeration. Read on to see how perlite can improve your next grow.
Perlite is a common soil amendment that helps stimulate marijuana growth. The increase in drainage helps prevent overwatering and nutrient buildup, while increasing root penetration and oxygen availability.
Perlite is a soil conditioner and growing medium that isn’t made from pearls, but is very light. It occurs naturally as an amorphous volcanic glass with a relatively high water content. When this natural substance is heated to extremely high temperatures (850-900°C), it expands substantially to become the commercial product perlite. Commercial perlite is extremely white due to the reflectivity of the bubbles in its structure, which also make it very lightweight.
Perlite is suited perfectly for clones. New roots can penetrate the lightweight structure of perlite with little effort. Faster root growth means a quicker turnaround from cutting to growing plant. Perlite drains so well there is little chance of drowning your cuttings.
Perlite is available in three grades; fine, medium, and coarse, with the fine grade usually selected when growing cannabis. It is used as a soil or coco coir amendment that promotes proper drainage and air retention. Perlite is the perfect complement to coco coir, which can retain a lot of water. Perlite holds a film of air close to its surface and creates air pockets no matter how wet the growing medium is.
Perlite is often added to grow mediums when cultivating cannabis. It is an excellent addition to coco coir and improves the structure of organic soils. Perlite is neutral and will not alter nutrient EC or water pH. Many nurseries add perlite to soil to decrease overall weight, which makes handling potted plants easier. This is also an advantage for the cannabis grower who moves their plants to take advantage of lighting conditions.
Add up to 20% if you only intend to use small amounts of nutrients and additives. The perlite will help with water and nutrient retention.
Add up to 50% if you intend to use a lot of nutrients and supplements to help prevent nutrient buildup. Too many nutrients can cause lockout in the root zone. The perlite will ensure efficient drainage.
Perlite is a common addition to grow mediums when cultivating cannabis. Find out why this lightweight soil conditioner is so effective.
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Look to see how much perlite is already in your mix (on the back of the bag) and take it up to 25 or 30% by adding more to the mix. Soil will hold on to to much water and go mucky without perlite being added.
First time grower here. I want to know what is better for growing (vermiculite or perlite) with the soil I’m about to use with my autofem. I’ve looked around on the forum’s but wanted advice from this crowd.
Yes use perlite with your mix. Perlite helps with drainage and does not retain any water, some water may sit in the pockets of the perlite rocks but very minimal. Vermiculite is for holding onto moisture and used as a wicking agent to soak up water from below. Vermiculite in with soil will just give you moisture and oxygen issues at the roots.
Total Nitrogen (N): 05%
Available Phosphate: 06%
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Years ago, I bought a four cubic foot bag of perlite and a four cubic foot bag of vermiculite. I have gone through lots of bags of perlite since then – but that same bag of vermiculite is still around here somewhere (if I haven’t given it away and forgotten about it), and that’s after throwing odd scoops into various vegetable gardens here and there (mostly because, well, I had the stuff laying around).
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Exactly. Perlite and vermiculite can almost be considered to be “polar opposites.” Before I started using coco, before people started calling the method “hempy,” I sometimes grew in a medium that was a mixture of perlite and vermiculite. Pure perlite dried out too quickly, so I added vermiculite to the mix to help it hold on to some of the nutrient solution I was using a little better. I didn’t use a whole lot of vermiculite as cannabis doesn’t like to sit around with “wet feet” (waterlogged) any more than I do . How much you’d want to use depends somewhat on the size of the perlite you’re using. Also, I suppose, on things like the type of containers you’re using and the amount – and size – of your drainage holes. If you have a few extra containers, you can try some different ratios even without having a plant in them. No, they won’t dry out as fast; there will be no plant to use up and transpire any of the moisture. But it will give you some idea of how the different ratios will perform in relation to each other (and, as there are no plants involved, there are none to screw up by experimenting 😆 ).
First time grower here. I want to know what is better for growing (vermiculite or perlite) with the soil I'm about to use with my autofem. I've looked…