Fritillaria kotschyana 2010 7

Do you dig these up when they are finished or just leave them in the pot?

These are not easy bulbs to grow. Seed sown about 6 years ago. First flowered last year, just one flower, five flowers this year. Will continue to grow these bulbs in a pot, careful watering and then allowed to nearly go dry when leaves & stems die down.

It's just I bought some in bulb form, planted them in a tub (with other bulbs) and they've come up (well I think it's them lol) and I dunno whether you're supposed to lift them when they've died back or not