Planted Tank Guru
Join Date: Jun 2004
Location: Baton Rouge, LA
The usual concerns:
1) Substrate needs some circulation/oxygen to avoid going anaerobic. Limit depth in pots to 2-3", leave as much open area as possible. Mesh can be attached to keep substrate from escaping while still allowing circulation. Pots made from breathable materials like unglazed terra-cotta might help a bit too.
2) Depending on the size of plants and planters, plants may become rootbound.