Quoting quote, seems perlite is not all the same in this and some seem more crumbly right from the start. Squeeze a pea size grain an$ it is dustwhile others are harder and have better integrity.
Anyone use crushed granite gravel for drainage. It’s used extensively in the upper Midwest for roads and trails.
I use medium sized pumice in my beds for aeration. Works great for me.
On a different note regarding a post I saw earlier. Cover crop is not going to be stealing much in the way of nutrients. The amount of nutes found in your soil is going to be way more than the actual cannabis plant can uptake, and thus it isnt going to straight compete against your cover crop. We aren't growing another high nutrient hog plant as cover crop, like tomatoes or something, your growing smaller plants that are being used to keep the soil moist and safe. I dont cut down my cover crop unless it is literally interfering with my cannabis plants, and when I harvest, I then trim back the cover crop and let it regrow. Any nutrients that were "stolen" aren't going anywhere but back into the soil anyway. Also cover crop performs other benefits such as keeping a diverse population of microbes around your plants. Every plant is going to need something different at any given moment, the plants put out specific exudates to attract specific microbes to get specific nutrients. Clover might be looking for some lead while your cannabis is looking for some boron or maybe some zinc. And when your cannabis wants some lead, well the microbes are nearby thanks to your clover, and wa la, your cannabis is being more efficient since the microbes that support it are already near the root zone. Remember by nearby I'm talking about millimeters not feet. The roots only grab nutes that are within millimeters of the root tips (without help).
Cannabis is going to dominate most cover crops, and the competition is not happening. Cannabis grows too big too fast to find interspersed clover, rye grass, dill, whatever your cover cropping as competition. It's like a NBA star on the court with a bunch of high schoolers. It's not competition, the star is still going to do what he wants.