When to cut back penstemons

When to cut back penstemons

“Because many penstemons are not reliably hardy, a hard winter can result in serious losses,” said the RHS.

“It is, therefore, advisable to propagate some fresh stock each year in late summer and keep it in frost-free conditions until the following year.

“Cuttings are the best method when propagating a named cultivar, as these do not come reliably true from seed.

“However, seed, division, and layering can also be used.”

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