soil amendment
Garden waste and fruit and vegetable scraps can be turned into a valuable soil conditioner.
The company converts yard trimmings into products such as soil conditioner for sale locally.
I chose cocoa mulch soil conditioner.

SMART Vocabulary: related words and phrases

Improving fertility & pest control
agrochemical
anti-pesticide
antifungal
bonemeal
coir
fertilization
fertilizer
Frankenfood
frass
fructify
irrigate
manure
mulch
over-fertilization
over-fertilize
paraquat
unfertilized
unirrigated
vermicompost
weedkiller