- Variety Info
- Sowing Info
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Variety Info
Family: Asteraceae
Type: Sunflower (Learn more)
Native: North America
Hardiness: Annual
Exposure: Full sun
Bloom Period: Summer to frost
Plant Dimensions: 4'–6' tall
Variety Info: 3"–6" deep red flowers
Attributes: Attracts Pollinators, Cut Flower, Drought Tolerant, Heat Tolerant
Sowing Info
When to Sow Outside: RECOMMENDED. 1 to 2 weeks after your average last frost date.
When to Start Inside: 2 to 4 weeks before your average last frost date. Sunflowers are senstive to root disturbance; sow in biodegradable pots that can be planted directly in the ground.
Days to Emerge: 10–15 days
Seed Depth: ¼"–½"
Seed Spacing: A group of 3 seeds every 18"–24"
Thinning: When 3" tall, thin to 1 every 18"–24"
Your hardiness zone is
- LainieVerified ReviewerRated 2 out of 5 stars7/18/25Mine are black.
I’ve been waiting and waiting for these to open! First bloom finally happened this morning. It’s definitely not “true red” —it’s black. Giving two stars because the seeds all germinated and the plants are six feet tall.
Which best describes you as a gardener? IntermediateBIBotanical Interests7/24/25Hey Lainie,
Thank you so much for taking the time to share your thoughts in a review. A flower might not bloom in the color you were expecting for several natural reasons, and it doesn’t necessarily mean something is wrong. Soil conditions can play a role; certain flowers, like hydrangeas, change color based on soil pH and mineral content. Weather and temperature fluctuations, such as heatwaves or cold snaps, can impact pigment development and lead to muted or altered flower colors. Your feedback is invaluable to us, and we are committed to ensuring your experience is positive. Please don't hesitate to reach out to our customer service team with any questions. Thank you once again for your input. Keep on growing 🌻️
- Melody P.CA, United StatesVerified ReviewerRated 5 out of 5 stars6/28/25Gorgeous! Zone 10b
Very pretty dark red flowers are striking in the garden. Some branching as well for prolonged beauty. I grow this every year!
Which best describes you as a gardener? IntermediateWho do you grow for? YourselfHow do you prefer to grow? Raised BedBIBotanical Interests6/30/25Hey Melody,
We're so happy to hear your Rouge Royale Sunflowers are putting on such a stunning show year after year. Those dark red blooms really are striking - they make such a bold statement in any garden! And the branching is such a wonderful bonus for extended color and beauty throughout the season. It sounds like you've found a true favorite that keeps delivering. Here's to another gorgeous year of those dramatic red sunflowers! Keep on growing 🌻
- Rachel P.Rated 4 out of 5 stars4/19/254 Stars
I have great success with most of the seed I have gotten from botanical interest. These sunflowers are no exception. However, my flower seems to be much darker. I don't know if something is off in the soil (like hydrangeas need acidic for purple and pinks) or if it will redden as it grows. 🤔 I am container gardening them and wish I had put them in a bigger grow bag. But that was my mistake.
BIBotanical Interests4/29/25Hey Rachel,
Thank you so much for sharing your photo. I've reached out to you via email to offer assistance. Your feedback is invaluable to us, and we are committed to ensuring your experience is positive. Thank you once again for your input. Keep on growing 🌻️
- Ashley D.Rated 5 out of 5 stars10/20/245 Stars
This sunflower is gorgeous! I didn't realize when I bought the seeds that it would be a multi-headed sunflower. I only had about 2 days where all of the blooms at the top of the stem were in full bloom (as seen in the photo), so that particular time is fleeting. However, the main bloom lasted about a week and a half or two weeks. And though in the photo it looks like the blooming is complete... nope. It still has several more blooms on the way lower on the stem! Its the gift that keeps on giving. My flower is approximately 4 and 1/2 feet tall and did well in a 2 foot wide, 1 1/2 foot deep rasied bed. No amendments to the soil needed to get the results you see in the photo. Love it!
Which best describes you as a gardener? Intermediate - Nancy L.Verified BuyerRated 5 out of 5 stars9/30/245 Stars
I am trying to expand my flowers in my garden. Adding these sunflowers will be not only beautiful but great for the pollinators. Can wait to see their beauty next season.
Which best describes you as a gardener? Intermediate