Clematis armandii - No new growth
Last year I planted three Clematis armandii. The one that grew the most last year also had the most blooming this spring. But no new growth.
The other two had a few flowers plus lots of new growth. I trimmed them a couple weeks ago to encourage branching, and they have started to send out new branches already. But the one plant has yet to show any signs of new growth.
Any ideas what might be causing lack of growth?