Mammoth Sunflower Flower Seeds

Mammoth Sunflower Seeds | Non-GMO | Heirloom | 15 Seeds

Mammoth Sunflower Planting Guide

Mammoth sunflowers are a popular choice for gardeners who want to grow the tallest and largest sunflowers possible. These massive flowers can reach heights of up to 14 feet and produce blooms that are up to 12 inches wide.

When to plant mammoth sunflowers

Mammoth sunflowers should be planted in the spring after the last frost. The ideal soil temperature for sunflower seed germination is between 70° and 75°F.

Where to plant mammoth sunflowers

Mammoth sunflowers need full sun and well-drained soil. They are tolerant of poor soil and drought conditions, but they will thrive with regular watering and fertilization.

How to plant mammoth sunflowers

To plant mammoth sunflowers, direct sow the seeds into the ground. Space the seeds 18-24 inches apart. Plant the seeds 1 inch deep. Water the seeds regularly and keep them in a sunny spot.

Caring for mammoth sunflowers

Mammoth sunflowers need regular watering, but be careful not to overwater them, as this can lead to root rot. Fertilize mammoth sunflowers every few weeks with a balanced fertilizer.

To encourage more blooms, deadhead mammoth sunflowers regularly. Deadheading is the process of removing spent blooms. This will signal the plant to produce more flowers.

Harvesting mammoth sunflowers

Mammoth sunflowers can be harvested for fresh cut flowers or dried flowers. To harvest for fresh cut flowers, cut the stems at a 45-degree angle when the flowers are in full bloom. To harvest for dried flowers, cut the stems when the flowers are just beginning to open. Tie the stems together in bunches and hang them upside down in a dark, well-ventilated area.

Tips for growing mammoth sunflowers

• Choose a sunny spot in your garden with well-drained soil.
• Plant the seeds 18-24 inches apart.
• Water the seeds regularly and keep them in a sunny spot.
• Fertilize mammoth sunflowers every few weeks with a balanced fertilizer.
• Deadhead mammoth sunflowers regularly to encourage more blooms.
• Stake mammoth sunflowers to prevent them from falling over.