Penstemon (Beardtongue) in Zone 6a & 6b

Penstemon digitalis

When to plant penstemon (beardtongue) in zone 6b

Zones 6a and 6b share the same average frost dates in our data, so this page covers both.

Method: Direct sow: Direct-sow outside. Penstemon (Beardtongue) doesn't transplant well, or doesn't need the extra time indoors.

Start indoors	Not typically started indoors
Direct sow / transplant outside	Mar 28–Apr 4
Estimated bloom	Mar 27 '28–Apr 3 '28 (First real harvest the season after planting)

Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 2-4 ft.

Penstemon digitalis is a tough North American native that flowers in early summer and asks for very little.

How penstemon (beardtongue) fits zone 6's season

Zone 6b's frost-free window runs about 173 days, from April 25 to October 15. Penstemon (Beardtongue) takes about 1 growing season to reach full flowering, so what matters here is how many of these seasons it gets, not whether one is long enough.

Penstemon (Beardtongue) is hardy in zones 3-8, so in zone 6b it stays in the ground through winter and comes back rather than being replanted. Allow about 1.75 ft of spread at maturity.

Good companions

No standout companions recorded yet for Penstemon (Beardtongue).

Where to buy penstemon seeds

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