The Nursery I work for has not tried P. strictus, but we did try two Hybrids last year...from Sunny Border for our own learning curve. We used these only due to the fact that the crew had cut back the P. digitalis 'Mystica' and 'Huskers Red'. We did as you did, but we did use Dip n' Grow and Hormodin? powder on the cuttings and had brilliant success. Within three weeks they were rooted. We followed the instructions in Penstemons - David Way & Peter James.
Mr. Kyle Fletcher Baker, MCN Maine Zone 5 --- On Sat, 1/22/11, Linda Nelson <[email protected]> wrote: I could use some comments and help with the propagation of the Penstemon strictus hybrid I described earlier this week. I have read the vegetative propagation sections in books by Bob Nold; Dale Lingren and Ellen Wilds; as well as David Way and Peter James. I tried the cuttings route last June with 10 cuttings from 5 branches. These had powdery mildew (slight), so I washed them with mild soap. The dried cuttings were placed overnight in a refrigerator at 400F. Next day, the lower leaves were removed and the nodes were dipped in naphthalene acetamide. The cuttings were placed in small pot with sterile soil (each had 2 leaves remaining and were 6 in long). The dampened soil pots were placed in a large glass closed container during the day and the top of container was removed at night. After 3 weeks, there were no survivors, leaves were blackened and dry. I tried again in early September with 4 cuttings using the same procedure, but lost them in 2 weeks. I'm guessing that I need to go with plastic bag covers which allow a bit more air circulation. Also, perhaps I should have used indole-3-butyric acid (or nothing at all) as a hormone stimulant. Regardless, I shall make certain that I don't do overhead watering to keep the fungi to a minimum. Help! Dave Nelson Richland , Washington 500F today with similar good weather for a week -----Inline Attachment Follows----- _______________________________________________ Alpine-l mailing list [email protected] http://mailman.science.uu.nl/mailman/listinfo/alpine-l
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