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Shade cloth (depending where ya are 10-40%) shade. Install the least expensive most basic shade patch (scalable to 100s of acres) you'll be happy...
Depends on where you are. In the SoCal desert my GHs all have 6 mil opaque (6%) plastic + 30% shade cloth from June through Sep. Keeps temps 10...
Your mix sounds great. I use biolive in lieu of crab, in addition to neem, kelp, MB. Use rice hulls as mulch because top dressing water in so...