- Make sure these guys get a fair bit of sun.
- Clay pots are great for herbs because they keep moisture.
- Houseplant mix is just fine. Compost mix may bring bugs.
- Feed every month in summer and every three months in fall and winter.
- You'll know when to water if you stick two fingers in just below the surface and it's dry. They like to be most, not damp. Make sure your pot has adequate drainage.
- Grow rate is highly variable. Repot when they're overflowing. If you move them too early then their roots will spread before the leafy greens. They grow down first, then up, they want to be cosy first.
Think of where they'd grow in the wild. :)
Ps: old teabag contents, in moderation, make great fertilizer.