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2024 Seed Catalog

Penstemon Twizzle Blue - Penstemon barbatus

PEN0004

Twizzle Blue

Penstemon Seeds

Penstemon barbatus syn. Chelone barbata

Fleuroselect Approved Novelty Winner. Bright blue, 1-1½ in. tubular flowers on vigorous, well-branched plants. 2 to 3 ft. long stems make excellent cut flowers. Plants bloom June through September and will bloom the first year when started from seed. Flowers attract hummingbirds, bees and other beneficial insects. Winter hardy to zone 5.

20 seeds - $4.99
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View all of our Penstemon varieties.

Growing Twizzle Blue Penstemon Seeds

Bee introduces how to plant

Plant Penstemon Seeds: Sow penstemon seed in cell packs or flats, press into soil, and barely cover. Kept at 60-70° F., germination in 14 to 30 days.

Grow Penstemon: Penstemons prefer full sun, part sun in hottest climates. Plants need little to moderate water once established. Avoid overly fertile soil. Flowers attract butterflies and hummingbirds. Plants are deer resistant.

Shipping Information

U.S. Shipping Rates

Free shipping on U.S. orders over $60.00.
Free priority shipping on U.S. orders over $150.00.

Standard U.S. shipping is $5.99.
Priority U.S. shipping is $9.99.


International Shipping Rates

Shipping to Canada is $13.99.
International shipping to all other countries is $15.99.

Satisfaction Guarantee

We guarantee all the seeds we sell for one full year from the date of purchase. If you are unsatisfied with any seeds purchased from Swallowtail Garden Seeds, we will issue a refund. For customers in the U.S., we can send one-time replacements or issue a refund.