Customer Service Hours
Mon-Fri 8-4 MST
Features
Family
Plantaginaceae
Native
Colorado, Wyoming, New Mexico, Arizona, Utah
Life Cycle
Perennial
Plant Height
Tall (Greater than 24")
Flower Color
Blue
Bloom Season
Early summer
Further Information
Plant Characteristics
- Attracts Hummingbirds
- Attracts Pollinators
- Cut Flower
Growing Conditions
- Drought Tolerant
- Heat Tolerant
Plant Resistance
Deer Resistant
About Penstemon
Penstemon strictus
Brilliant, 1" blue-violet, tubular flowers
Planting Penstemon
Plant Spacing
A group of 3 seeds every 18"
Hardiness Zones
4, 5, 6, 7, 8, 9
Light Required
Full sun to part shade
Plant Height
Tall (Greater than 24")
Planting Depth
⅛"
Planting Details
| Seed Depth | ⅛" |
|---|---|
| Seed Spacing | A group of 3 seeds every 18" |
| Thinning | When 2" tall, thin to one every 18" |
| Germination | 14–35 days |
| Start Indoors | 6 to 8 weeks before your average last frost date. Germinates best in cooler soils (near 55°F). |
| Direct Sow | 6 to 8 weeks before your average last frost date or late fall. |
Find Your Frost Date & Grow Zone
Average First Frost Date
October 19
Average Last Frost Date
May 19
Your Hardiness Zone is
5b
Send Your Recommendation
Total 5 star reviews: 13 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 2
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Rating
Which best describes you as a gardener?
15 reviews
- Valerie D.Verified BuyerRated 5 out of 5 stars9/16/25Blue penstemon
Looked great in my flower bed! The color is amazing.
Which best describes you as a gardener? BeginnerBIBotanical Interests9/16/25Hey Valerie D.,
What a wonderful review! We're so thrilled to hear that your Rocky Mountain Blue Penstemon looked absolutely fantastic in your flower bed!
That amazing color you mentioned is exactly what makes this variety so special - those vibrant blue blooms really know how to make a statement in the garden! There's something so striking about that true blue color that just catches your eye and draws you right in. It sounds like they found the perfect home in your flower bed!
Thank you so much for sharing your positive experience with these beautiful penstemons. Your review will be so helpful for other gardeners who are looking to add some stunning blue color to their own gardens!
Keep on growing 🌻️
- Keifer B.Verified BuyerRated 5 out of 5 stars6/9/245 Stars
Love you guys, great products!
Which best describes you as a gardener? Intermediate - Michelle M.Rated 5 out of 5 stars5/17/245 Stars
I grew this in some milk jugs for winter sowing last year then transplanted them to a raised garden bed. They were very leafy and healthy but no flowers. I almost forgot what they were. This season they came roaring back and now have flowered out beautifully. It's taller than my kindergartener. I'm going to move it to another more permanent part of my yard. I hope I don't kill it by doing that but this bad boy is getting big. I still can't believe it came from a seed packet. Highly recommend just be patient.
Which best describes you as a gardener? Beginner - Shraddha S.Rated 5 out of 5 stars5/6/245 Stars
Beautiful perrenial for zone 6 garden. I grew the seedlings with wintersowing method 2 years ago. The colors are so pretty. Extremely easy to grow, and thrives on neglect. Does well withh drought and poor soil.
Which best describes you as a gardener? Intermediate - KerriVerified BuyerRated 5 out of 5 stars11/11/235 Stars
Love the delicate reliable flowers on penstemon.