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I have two containers of Penstemons that flowered prolifically the first year i had them they are now 3 years old - not many flowers last year and none this year - wondering if i prob just need to repot or put them in the ground?
Similar result, different problem - I have some penstemons my Mum bought me from T&M as plug plants this year; they were very small and still are! They are in best poss soil, have watered loads and the weather has been as we know. There's no hope of getting a flower this year, they're only four or five inches tall now ....
I had the same plants from T&M Sara, out of 6 of them, 1 has flowers, didn't expect any flowers this year to be honest so they are a bonus. Thought they would be too small to do much this year.
Hi Paula, sorry for late reply - I thought I might have done something wrong planting the plugs so I'm glad to hear that I'm not alone - mine are still only about six inches tall which is frankly disappointing as they weren't particularly cheap and Mum bought them as a present for me.
Penstemons are at their best in their first and second years then deteriorate. So cuttings should be regularly taken