Working with an outdoor plot. Decomposed granite, primarily. Area has grown primarily citrus & avocados for 30+ years. I’ve dug out multiple 50 gallon holes and need to amend the soil. Limited organic resources right now because of Covid-19. I plan to mix in 30% (15 gal) compost. How does that sound? I’ll also be adding in a pellet organic vegetable food at recommended strength. Any other suggestions? Thanks in advance!