Site selection

Roots from adjoining trees and shrubs will thrive when the garden is watered and fertilised to the detriment of your vegetables.
So a site must be free of invading roots.

Vegetables thrive in sunshine. Only green leafy vegetables can best be grown under various levels of shade though it will alter their growth and flavour so a gardener ha to decide if this is beneficial. Consideration of roots and sunshine are crucial in the planning stage...