Crops that produce above ground and are cooked well before being eaten can be supported by gray water. People argue about below ground crops that are cooked well and grass land where livestock graze. On these you need local rules combined with inspections.
Irrigating Plants With Greywater
Whatever your water source, grow plants that produce food, provide habitat to wildlife, or create other beneficial uses like mulch, fertilizer, fuel, or building materials!
In general, larger plants, such as trees, bushes, and perennials, are easier to irrigate with simple greywater systems than smaller plants. Turf grass, made up of hundreds of individual plants, is the most difficult to irrigate with greywater- we don’t recommend it. Remember you can safely irrigate any food plant so long as greywater doesn’t touch the edible portion of the plant (no root crops).
With a simple greywater system, for example a laundry-to-landscape or branched drain system, greywater should be discharged onto mulch (either on the surface or subsurface depending on your state code requirements). Don’t discharge greywater directly onto the bare ground, it can clog the soil by filling the small air gaps in its structure and then won’t drain well. Mulch prevents this potential problem since it filters the particles, enabling greywater to soak into the soil below. Any type of mulch works, like wood chips, straw, or bark.
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https://greywateraction.org/greywater-choosing-plants-and-irrigating/
Dr.Ali,
please look over here:
https://greywateraction.org/greywater-choosing-plants-and-irrigating/
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