🌞 Grow big, stand tall, and harvest massive—be the envy of your neighborhood!
The Russian Mammoth sunflower seeds produce towering 15-foot plants with enormous dinner plate-sized heads. This heirloom variety is heat and drought resistant, ensuring robust growth in USDA Zone 5 and sandy soils. With 80% germination from 2024-grown seeds, expect a bountiful harvest in about 80 days, while supporting pollinators and enhancing your garden’s ecosystem.
| Product Care Instructions | Water,Well-drained |
| Material Features | Heirloom |
| Unit Count | 1 Count |
| Number of Pieces | 50 |
| USDA Hardiness Zone | 5 |
| Soil Type | Sandy Soil |
| Moisture Needs | Moderate Watering |
| Expected Blooming Period | Winter, Summer |
| Sunlight Exposure | Full Sun |
| Additional Features | heirloom |
R**N
Quality
These seeds were quality. Big beautiful sunflowers like I remember dad growing when I was a child.
J**I
Mammoth sunflowers
This is my first time growing sunflower seeds and my husband and I chose the mammoth heirloom for a start.. I put them in an egg carton with some potting soil and whammo! Within a few days they were already sprouting up and out like they were on fire.. Needless to say I transplanted them after 2 weeks and they have already started they're second set of leaves. I'm getting ready to put them in the ground and I can't wait to see how they do.. I will write another update soon
D**E
Jury still out.
Only had two of the many that I planted came up. But they were very impressive. Looking forward to next year.
C**A
65 Mammoth Sunflower Seeds
Starting these mammoth sunflower seeds in ground today.The package came with 65 seeds. They look good to me so I'll try them and update periodically.I'm in zone 9b and I'll be planting in an area with morning and afternoon sun.
G**Y
Impressive and tall. Large seed heads
Low germination rate. Had to replant several times
G**B
did not come up
i PLANTED ALL IN THE PACKAGE AND HAD ONLY 3 COME UP .I WOULD NOT BUY AGAIN .I HAVE BEEN GARDENING FOR THE PAST 40 YEARS AND I KNOW WHAT I AM DOING .
M**Y
Huge!
They grew super tall and nice heads! Yummy seeds!
B**G
Disappointed.
These were overrated. Disappointed.I planted all 50. I used rich compost around the seeds. I watered generously. Very poor yield.
Trustpilot
3 weeks ago
2 weeks ago
