Why are the donor plants tops so flimsy?

Technically I can take clones from my donor plant tomorrow but instead Im waiting a week because of the cycle. Its really bushing out. Has about 12 good clones I can take.
My question is why are the tops all flimsy and they seem very weak. Im hoping that by next week the stems will have bulked up and become woody and stiff so I can put them into oasis without breaking the stem. The plant has some nitrogen burn and possible N toxicity. Very dark green leaves. Could that have anything to do with it?

Generally if you want thicker stronger stems you want to hit them with some strong wind. The extra N shouldn't be a cause but you do want to keep that regulated.