Answer:Eight to 12 inches is usually adequate. If drainage is a problem, or if the plants you are growing prefer drier soil, the bed could be taller and filled with a porous growing medium.
Step-by-step explanation:
Answer:
12x+4y=40
-4 -4
---------------
12x=36
--- ---
12 12
36÷12=3
n^22 (I love your profile picture by the way)
20
