It must depend where it is ... my Sweet Kate doesn't seed around the place ... wish it did ... but thankfully the clump does increase gradually in size.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Yes tradescantia ... love it ever since I first inherited a clump in a new garden in Suffolk.
Now we have the glorious golden leaved form 'Sweet Kate' ... just waiting for her to come into flower. Named for another Suffolk gardener John Tradescant
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Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
I love Tradescantia Osprey.