How deep do you plant penstemon seeds?
al., (2004) state that the planting process for Rocky Mountain penstemon is similar to other penstemon species. The general recommendation is to plant seed in the fall from 1/8 to no more than ΒΌ inch depth into a firm, weed-free seedbed. Good seed to soil contact is important for germination and establishment.
Is penstemon easy to grow from seed?
Germination of Penstemon strictus was good for seed up to 6 years old. Many penstemon seeds require a long cool, moist stratification time before they will germinate. The seeds can be sown anytime from November through early March in cold climates and germination will begin when the weather warms up.
How long do penstemon seeds take to germinate?
around 21 days
For best results, sow seeds onto a good soil-based compost. Between February and April, or during September. Cover the seeds with fine grit or compost to approximately their own depth. Germination is variable but most commonly around 21 days, it can be quicker if kept at 15 to 20C.
Will penstemon bloom first year?
Although penstemon flowers don’t generally have a significant fragrance, the plants do attract hummingbirds and are deer resistant. One of the biggest improvements for penstemon is the capability to flower the first year. This means that many of the new penstemon not only look like annuals but behave like them as well.
Is penstemon electric blue hardy?
Also known as ‘garden catmint, ‘purssian blue’ is a hardy perennial with grey to green foliage with a subtle aroma. This easy-to-grown perennial is perfect for ground cover, providing an array of violet flowers from June through to September, making it a suitable alternative to lavender.
Can penstemon be grown in pots?
Penstemon are upright plants, and planting too shallow can also cause some problems with plant stability. Although penstemon can be grown in a range of upright containers, they can get rather tall and are better managed in 5-inch or larger pots.
Do you deadhead penstemon?
Planting is best done from mid- to late spring. Watering of 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. Deadheading to remove spent flowering spikes helps promote a long season of flowering.
Where does penstemon grow best?
Where to grow penstemons. Border penstemons are perfect for growing in the middle of a mixed border. They do best in a fertile, reasonably moist soil that is free-draining. Full sun or light shade is ideal.