If you leave them alone and provide the right conditions, they'll multiply very quickly indeed, get the conditions right and they'll do it by themselves.
Seed is easy, as long as you take it when it is still green, but comes off the plant easily. Sow immediately and keep cool, shady and moist and germination is in Spring.
Or, in September furtle round in the soil where the plants are growing and dig up some of the roots and replant them where you want more of them.
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If you leave them alone and provide the right conditions, they'll multiply very quickly indeed, get the conditions right and they'll do it by themselves.
Seed is easy, as long as you take it when it is still green, but comes off the plant easily. Sow immediately and keep cool, shady and moist and germination is in Spring.
Or, in September furtle round in the soil where the plants are growing and dig up some of the roots and replant them where you want more of them.
thank you for all your advice i think i will try both methods.