Is it important to put an inch layer of rocks under your soid?

[tonyroma]

2nd time grower here, my buddy told me about this. I have no idea if he's bullshitting me.

[Bubby]

Sure helps with drainage, which is important. Some people use river rocks, or perlite.

[Helile]

Sand is also an option. Lava rock is also really good.

[newgreenthumb]

Also helps with air circulation too. :D