Sunflower Growing Guide

All you need to know to grow successfully!

Plant Family:
Plant Type:

Square Foot Spacing:

Typical Season:
Typical Zones Grown In:
3, 4, 5, 6, 7, 8, 9, 10
Growing Difficulty:

Sunflower is a plant that is primarily known for its large and bright yellow flower heads, which can grow up to 30 centimeters in diameter. The flower heads consist of numerous small flowers surrounded by brightly colored petals. Sunflowers can grow up to 3 meters tall and produce large leaves that are typically heart-shaped or spade-shaped. Sunflowers are an annual plant that can be grown for both ornamental purposes and for their edible seeds, which are often used in cooking and as a source of oil. They are native to North and South America but are now cultivated in many parts of the world. Sunflowers are also commonly used as a symbol of happiness and optimism.

How to Grow Sunflower Organically

  1. Choose a planting site: Sunflowers prefer full sun and well-drained soil. They can be grown in containers or in the ground.
  2. Prepare the soil: Sunflowers prefer loose, fertile soil. Amend the soil with compost or other organic matter to improve fertility and drainage. Sunflowers are tolerant of a wide range of soil pH levels.
  3. Plant the seeds: Sow the sunflower seeds directly into the garden bed after the last frost. Plant the seeds about 1 inch deep and 6-12 inches apart, depending on the variety. Cover the seeds with soil and water gently.
  4. Water the plants: Sunflowers need consistent moisture to grow well. Water the plants regularly, especially during dry periods.
  5. Fertilize the plants: Sunflowers benefit from regular applications of nitrogen-rich fertilizer, such as compost tea or fish emulsion. Apply the fertilizer according to package instructions.
  6. Provide support: As sunflowers grow, they may require support to prevent them from falling over. You can provide support by staking the plants or using a trellis.
  7. Harvest the seeds: Sunflowers are ready to harvest when the petals have wilted and the back of the flower head is turning brown. Cut off the flower head and remove the seeds by rubbing them with your fingers or a fork. Dry the seeds in a warm, dry place for a few weeks before storing them.

By following these basic steps, you can grow your own sunflowers and enjoy their bright, cheerful blooms all summer long. Sunflowers are a low-maintenance plant that is well-suited for beginner gardeners.

Planting Guidelines

The following are general guides to follow. However, nothing is set in stone. Feel free to experiment!

How to Start:
When to Direct Sow:
March, April, May, June, July, August, September, October
When to Start Indoors:
March , April , May
Sprouting Time:
2-3 Weeks

Ideal Temperature (C):

1/2 inch
Spacing (cm):
30 cm
Row Spacing (cm):
12-15 inches
Sun Exposure:
Full Sun
Maturity Time:
3-4 Months
When To Harvest:
May, June, July, August, September, October
How to Harvest:
Cut Flower Heads

Health Benefits

Growing your own food is one of the best things you can do for your health. Let’s check out some of the health benefits!

Is It Edible?
Edible Parts:
Seeds, Leaves
Potential Health Benefits:
Vitamin E, Calcium, Protein

Tips to Growing Organically

Growing without the use of pesticides and herbicides is easier than you may think and it’s better for the environment!

Companion Plants:
Radish, Corn, Pumpkin, Bean
What Plants to Avoid:
Common Pests:
Aphids, Whiteflies, Spider Mites
Common Disease:
Downy Mildew, Root Rot
Bonus Grow Tips:
Plant in sunny location, harvest flowers when they are fully open

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