Sunflower Seeds - Mammoth Grey Striped Sunflower Garden Seeds
Plant Basics
Size: 8-12ft tall, 12in wide
Growth Habit: Erect
Plant Depth: 1/2 - 1in
Spacing: 6-12in
Germination: 7-10 days
Sun: Full sun
The Mammoth Grey Striped Sunflower is the iconic classic sunflower. It grows 8-12 feet tall (or more!) with giant blooms that range from 8 to 15 inches. This variety is very easy to grow and is great for beginners or gardeners with limited time. Sunflowers are excellent at attracting pollinators. These make a gorgeous addition to the garden and are very popular as cut flowers due to their striking size and long vase life.
Growing Instructions:
1) Direct sow:
In spring after last frost date or threat of frost has passed.
Plant seeds 1/2- 1 inch deep about 6-12 in apart.
Keep soil evenly moist but not overly wet.
The more sun the better!
2) Transplant:
Start seeds indoors in spring around 6-8 weeks before last frost date.
Plant 1/2-1 inch deep in starting mix in a container or tray.
Cover the container with lid or loosely with plastic to retain moisture.
Place in a warm spot. (Placing heating mats under plants helps speed up germination time.)
After seeds germinate, remove plastic covering and continue to keep soil moist but not overly wet.
Grow lights are a good addition at this point, especially if seedlings do not receive a lot of direct sunlight. Keep plants as close to grow lights as possible but not closer than 2-3 inches.
Move plants to larger containers after they've grown 2 sets of true leaves.
At this point, I like to use a tabletop fan pointed at the plants help prepare them for outdoor conditions.
About 1-2 weeks before you plan to transplant outdoors, start to harden the plants off by placing them outside. Start in the shade for an hour or two and extend the time each day, gradually exposing them to more sunlight, until they can be left outside for several hours in direct sunlight.
Transplant after threat of frost has passed and soil temp is around 60-65 degrees.
All of our seeds are:
•GMO Free
•Open Pollinator
•American grown
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Additional growing instructions, tips and recipes on our website.
Growing information provided for informational purposes only.
Please message with any questions.
