Tip of the month: December
Pot soils can become compacted and depleted in organic matter over time. Adding fresh compost to the surface can help a little, but there are generally no worms in a pot to drag it under the surface and mix it throughout the pot. This can leave you with soil that is still compacted under a layer of compost!
One tip for keeping organic matter levels healthy for annual crops is to leave the roots in the soil. When you tomatoes, beans, cucumber, rocket. lettuce or any other annual crop reaches the end of it’s lifespan for the season, don’t pull the remains of the plant our by the roots, cut it off at the base and leave the root mass to rot into the soil. Of course you can also tip the soil out and mix compost through it ready for next season, however, this practice destroys many fungal threads that are present in healthy soil. Better to leave your pot soil as undisturbed as possible and cut plants off at the base, put a top dressing of compost and plant your next seasons crops.