Customer Service Hours
Mon-Fri 8-4 MST
Features
Family
Polemoniaceae
Native
Mexico
Life Cycle
Annual
Plant Height
Vine
Flower Color
Blue
Bloom Season
Midsummer to frost
Further Information
Plant Characteristics
Good for Containers
About Blue Cathedral Bells Cup and Saucer Vine Seeds
Cobaea scandens
2" bell-shaped flowers open pale green and mature to violet purple.
Planting Vine
Plant Spacing
A group of 3 seeds every 24"–36"
Hardiness Zones
10, 11, 12, 13, 9
Light Required
Full sun to part shade
Plant Height
Vine
Planting Depth
¼"–½"
Planting Details
| Seed Depth | ¼"–½" |
|---|---|
| Seed Spacing | A group of 3 seeds every 24"–36" |
| Thinning | When 1" tall, thin to 1 every 24"–36" |
| Germination | 10–30 days |
| Start Indoors | Recommended in cold climates. 6 to 8 weeks before your average last frost date. Ideal soil temperature for germination is 70°-75°F. |
| Direct Sow | 1 to 2 weeks after your average last frost date, and when soil temperatures are warm. |
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: 18 Total 4 star reviews: 6 Total 3 star reviews: 5 Total 2 star reviews: 1 Total 1 star reviews: 4
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Rating
34 reviews
- StephVerified BuyerRated 4 out of 5 stars12/30/25Soak and Start Early
It took me two tries growing these to finally get to flowers, and they flowered late. But they are stunning and I will grow them again. This time I will start indoors very early, like, right after New Years.
Which best describes you as a gardener? IntermediateBIBotanical Interests12/30/25Hey Steph,
Thank you so much for taking the time to share your experience with our Blue Cathedral Bells Cup and Saucer Vine Seeds! We absolutely love your persistence and dedication - it's so rewarding to hear that you stuck with them and were rewarded with those stunning flowers! Your tip about starting indoors right after New Years is fantastic advice for other gardeners who want to try these beauties. We're thrilled that despite the challenges, you found them worth growing again. Thank you for sharing your growing success and helpful tips with us. Keep on growing 🌻️
- SharlaRated 5 out of 5 stars9/20/255 Stars
I will look forward to these next year!
- Paul N.Verified BuyerRated 5 out of 5 stars4/7/255 Stars
Planted 6 seeds, 6 came up and are growing like crazy
- Monique M.Verified BuyerRated 5 out of 5 stars11/13/245 Stars
So far so good. Loving the growth process 😊
Which best describes you as a gardener? Beginner - Cindy M.Verified BuyerRated 5 out of 5 stars9/30/245 Stars
I am always impressed with their seed selection. I am also pleasantly surprised to find a high count of seeds in many of the seed packets as well. I will definitely be ordering more seeds in the near future.
Which best describes you as a gardener? Intermediate