Mulch

by putting wood shavings on a vegetable garden does it harm it or help it, I was told 2 different things…I was told it takes all the nutrients out of the garden, and I was told if I fertilize it…

Nitrogen deficiency

I bought a load of new soil and used it in deck planters that receive 7 hours of sun daily, in Toronto. The tomatoes, squash and beans have yellowing leaves. How can I give them the nitrogen they probably need…