Penstemon’s are a hardy perennial that like full sun or part shade & fertile, well drained soil. Cut back the old foliage
Penstemon’s are easy to grow in any fertile, reasonably moist, free-draining soil.
Is best done from mid- to late spring. Enrich the soil with about a bucketful of well-rotted organic matter and 70g per sq
m (2oz per sq yd)balanced general-purpose fertiliser to aid good establishment. Alpine and shrubby Penstemon’s need
relatively infertile soils, so no improvement is needed. Allow 45cm (18in)plants.
Well-established plants in medium to heavy soils should be seldom needed, but plants growing in light, free-draining
soils might need watering every two weeks in dry spells.
Removing spent flowering spikes helps promote a long season of flowering.
Penstemon’s can become woody and leggy if they are not pruned annually.
Trim them once the hard, winter weather is over (usually in late April or early May); until then old stems provide
valuable frost protection for the new shoots.
Never cut penstemons down in the autumn. Leave all the growth intact and wait until late April or early May.
Hardiness is a problem with most varieties, however, more are killed by winter wet than severe temperatures, so if your
garden has heavy clay soil always plant in spring or summer and add coarse grit. You could also choose a well-drained
slope or create a raised bed. Penstemons thrive in sunny positions and tolerate dry conditions.
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Penstemon Vanila Plum