These are standard ones. I received them as plugs from a G.W. offer, and transferred them to 3” degradable pots, watered them as normal and they are still less than 2” high. Even the ones I have planted out. Bob Humble
If they were I would have a look. The wraps are supposed to bio-degrade but if they do it is very slowly and many plant roots are unable to penetrate them properly. Even if they do manage it, they often don''t grow as well as they would without it.
I had some begonias that were just about coasting, nothing like they should have been and I lifted them and just cut down the sides of the 'teabag' so the roots could escape, without damaging them further by pulling it off. Replanted them and they have raced away.
I grew some pelargoniums this year from home grown seed and they are already nice sized little plants, larger than ones I saw on sale for bedding the other day.
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Bob Humble