2024 - What I harvested today

I keep them on a south facing windowsill. They're kept on the dry side and I take them off the windowsill overnight if it's particularly cold.

The trick is not to keep the overwintered plants. What I do is chop them back in early spring, with a bit of feed to encourage side shoots to grow.

The side shoots are taken off when they're about 10cm or so and put in compost (or just water) to root. The overwintered plants are then trashed.

I've done this for the past three years after watching Charles Dowding mention in a video that he kept a discontinued variety he liked going by cuttings. Each plant easily gives four good cuttings to pot up in spring.

If you have seed, I wouldn't bother, but it is handy if you run out.