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Description
planting mammoth sunflower seeds Sunflower Mammoth – Pittsboro FeedThis giant among sunflowers is a fast grower whose single stalk can reach 12' tall and produces one 10" 12" flower! Not fussy about soil, it's very easy to grow and drought tolerant. Grow in a tight row to make an attractive screen. Sow monthly for continual bloom. Variety Info Family: Asteraceae Type: Sunflower Native: North America Hardiness: Annual Exposure: Full sun Bloom Period: Summer to frost Plant Dimensions: 6'12' tall Variety Info: Up to 12"
This giant among sunflowers is a fast grower whose single stalk can reach 12' tall and produces one 10"-12" flower! Not fussy about soil, it's very easy to grow and drought tolerant. Grow in a tight row to make an attractive screen. Sow monthly for continual bloom.
Variety Info
- Family: Asteraceae
- Type: Sunflower
- Native: North America
- Hardiness: Annual
- Exposure: Full sun
- Bloom Period: Summer to frost
- Plant Dimensions: 6'–12' tall
- Variety Info: Up to 12"-wide flowers with yellow petals and a brown center. Single type.
- Attributes: Attracts Pollinators, Cut Flower, Drought Tolerant, Heat Tolerant, Edible Flower
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 24"
- Thinning: When 3" tall, thin to 1 every 24"
Growing Info
- Harvesting: Seeds are ready to harvest when the back of the head has dried and turned brown, about 4 weeks after the flowers have been pollinated. Petals will have wilted and fallen off, and the seeds will be plump, and colored white with gray/black stripes. Seeds ripen around the outside of the flower first; the ones in the center will ripen last. Average yield is approximately 1 pound per head.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.7 ★★★★★
Based on 6 reviews
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Product Reviews
★★★★★ 5
Works great
Be careful NOT to get it on painted surfaces it will remove the paint. It does exactly what they say it does and if you follow the directions to the letter you won't have any problems
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Reviewed in the United States on November 15, 2024
★★★★★ 5
Worth the time and effort.
Perfect solution to my faded out, sun damaged gel coat. Follow the instructions to the letter for a factory-like shine. One bottle was barely enough for our 22' Winnebago, another bottle for our 29' Cabin Cruiser. Many compliments on the shine.
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Reviewed in the United States on April 24, 2025
★★★★★ 4
A quality product which will clean an oxidized fiberglass trailer in preparation for the application of Poli Glow
I used this to remove the Poli Glow previously applied about two years ago to my fiberglass trailer. It seems to do a slightly better job of removing the PG than the other Prep solution, but I didn't do a side-to-side comparison. And the surface never achieved a completely uniform appearance after the stripping, although this may not be possible because of differences in the remaining gel coat surfaces. I also completely washed the trailer with soap & water after using this stripping product. I didn't do this the previous time and thought some of the prep compound may have been left on the surface resulting in a shorter life. Time will tell. Note: it is still "work" to strip the trailer, this is not a "magic" solution, thus the 4-star rating. But it, along with the Poli Glow, was the only way to get my oxidized trailer to look shiny. All the other products tried failed to bring a glow. I will purchase it again when redoing the trailer.
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Reviewed in the United States on March 5, 2017
★★★★★ 5
Stripper
I love this stuff. Been using it for years and never disappoint. Use all there products.
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Reviewed in the United States on October 22, 2025
★★★★★ 1
Does not work.
Do not use this product. It has left my RV all splotchy. It looks terrible. I am trying to find something that will work. I wish I had never used Poly glow to start with.
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Reviewed in the United States on June 9, 2022