Lobelia clump size

in Plants
Hi all, first time growing this from seed. I’ve already scooped out some clumps and potted them, they’re growing well, but how many should I have per clump?
Ive got between 6 and 10 in each one at the moment, should I thin them?
Ive got between 6 and 10 in each one at the moment, should I thin them?

East Yorkshire
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