114 Liechtensteinstrasse Vienna - Austria

Work Hours
Everyday: 8AM - 23PM

How to Grow Sunflowers

How Grow Sunflowers from Seeds

Sunflowers are easy to grow from seed and are fun for the whole family. They are one of the nation’s best-loved flowers and come in a variety of colors, including yellow, rusty-red, green, and even white.

Here is a thorough guide on how to grow sunflowers:

Choosing Seeds and Varieties

  • Sunflowers come in many varieties from dwarf (1-3 feet tall) to giant (12+ feet tall)
  • Popular tall varieties include Mammoth, American Giant, Sunbright
  • Shorter varieties are ideal for containers and smaller spaces
  • Choose single stem or multi-branched varieties

Site Selection and Soil Preparation

Where to Grow Sunflowers
  • Sunflowers need full sun – at least 6-8 hours per day
  • They prefer well-drained, nutrient-rich soil with a soil pH between 6.0-7.5
  • Work in compost or manure before planting to improve soil fertility
  • Choose a sheltered spot to prevent stalk damage from wind


  • Sow seeds 1 inch deep and 6-12 inches apart after danger of frost has passed
  • For continual blooms, make successive plantings every 2-3 weeks
  • Water the seeded area gently to avoid dislodging seeds

Care and Maintenance

  • Keep soil moist but not saturated while seeds are germinating
  • Use mulch to retain moisture once plants are established
  • Stake or cage taller varieties to provide support
  • Remove dead/faded flowers to promote more blooms

Pests and Problems

  • Watch for insect pests like sunflower moths and lygus bugs
  • Prevent fungal diseases by avoiding overhead watering
  • Squirrels, birds and deer may damage maturing seeds/plants


  • Cut stems just under flower heads when backs of blooms turn yellow
  • Leave a few inches of stem attached to avoid shattering seeds
  • Hang upside down in a dry, well-ventilated area to cure

With the right variety, sunlight, soil, and care – you can enjoy an abundant crop of cheerful sunflowers! Let me know if you need any other tips.

When to Plant Sunflower Seeds

The best time to plant sunflower seeds is between April and May. You can sow the seeds directly outdoors or start them indoors in pots.

Here are some tips on when to plant sunflower seeds:

When to Plant Sunflowers Seeds

• Sunflowers are warm season annuals that should be planted after the last spring frost date for your area. Cold weather can stunt growth or prevent seed germination.

• The ideal soil temperature for planting sunflower seeds is between 70-85°F.

• In most regions, the best time to directly sow sunflower seeds is in late spring (late April to early May in northern areas and May/June in southern areas).

• It typically takes 70-90 days from sowing until the flowers bloom, so plant your seeds accordingly to time blooms for mid-summer through early fall.

• If you want earlier blooms, start sunflowers from seed indoors 6 weeks before your expected last frost date. Transplant the hardened off seedlings into the garden 2-3 weeks after your last frost.

• For a continuous sunflower harvest, sow sunflower seeds every 2-3 weeks until mid-summer. These successive plantings will bloom over several months.

• In climates with a long growing season, you can also plant sunflowers as late as June or early July for fall blooming plants.

Essential factors are starting after frost danger passes, sufficiently warm soil temperatures, and timing blooms for the desired summer/fall period. With proper planning, you can enjoy sunflower blooms for months! Let me know if you need any other tips for perfect sunflower timing.

How to Plant Sunflowers

How to Plant Sunflowers

If you are starting your sunflowers indoors, sow the seeds in small pots of compost. Once the seedlings have emerged, thin them out so that there is only one plant per pot. When the seedlings are a few inches tall, harden them off for a week before planting them outdoors.

When planting your sunflowers outdoors, choose a sunny spot with well-drained soil. Space the plants according to the variety you are growing. For example, tall sunflowers may need to be spaced 3-4 feet apart, while dwarf sunflowers can be spaced closer together.

Caring for Sunflowers

Sunflowers need to be watered regularly, especially during hot weather. You may also need to stake tall varieties to prevent them from toppling over.

How to Harvest Sunflower Seeds

Once your sunflowers have finished flowering, the seed heads will begin to dry out. You can harvest the seeds once they are brown and hard.

Problems and Solutions

Sunflowers are relatively pest- and disease-resistant, but they can be susceptible to problems such as aphids and powdery mildew. If you see any pests or diseases on your sunflowers, you can treat them with organic insecticidal soap or fungicide.


Sunflowers are a rewarding flower to grow. They are easy to care for and provide weeks of enjoyment with their bright and cheerful blooms.

What is the best month to plant sunflowers?

Plant sunflower seeds in April or May. Put one seed in each small pot filled with soil meant for growing plants. Cover the pots with clear plastic bags and put them in a warm place. This helps the seeds sprout. Once the baby plants come up, take off the plastic bags.

Is a sunflower easy to grow?

Growing sunflowers is easy. They can handle hot weather, bugs don’t bother them much, and they grow quickly. Sunflowers are from North America originally, so they can grow well in most places. You can cut the flowers to have inside, leave the flowers on the plant to look pretty in your garden, or harvest the seeds to eat.

Where do sunflowers grow best?

Sunflowers grow best in soil that drains well and doesn’t stay too wet. They can grow in clay or sandy soil. Sunflowers like slightly acidic soil with a pH between 6.0 and 6.8. The soil shouldn’t be too alkaline or too acidic for sunflowers to thrive. As long as the soil drains properly and has the right pH level, sunflowers will do well.

Why’s my sunflower not well?

Your sunflower is probably dying because it needs more sunlight, water, or the soil isn’t draining well enough. Check the plant carefully for any bugs or diseases too. If parts of the plant are really damaged or dead, you’ll need to trim off those parts. Give the sunflower some extra care like making sure it gets enough sun and water but the soil isn’t too wet. With some TLC, it may perk back up.

How Long Do Sunflowers Typically Last?

With proper care and handling, sunflowers can brighten up your home for six to twelve days. To get the most longevity out of your sunflowers, select blooms that are just beginning to fully open. Look for sturdy, straight stems and vibrant flowers that face outwards. By choosing sunflowers at the optimal stage and providing them with fresh water and nutrients, you can enjoy their cheerful beauty for over a week.

Are sunflowers worth growing?

Sunflowers can be worth growing for several reasons. They can draw in helpful insects, but they can also distract harmful pests away from important vegetables. Sunflowers are generally simple to cultivate, but they do have a few possible threats, like wildlife and bugs. If you’re in a region where deer are common, you should be cautious when planting sunflowers.

Leave a Reply

Your email address will not be published. Required fields are marked *