Growing Sunflower

helianthus annuus : Asteraceae / the daisy family

Jan F M A M J J A S O N Dec
        P P            

(Best months for growing Sunflower in USA - Zone 5a regions)

  • P = Sow seed
  • Sow in garden. Sow seed at a depth approximately three times the diameter of the seed. Best planted at soil temperatures between 10°C and 30°C. (Show °F/in)
  • Space plants: 20 - 45 cm apart
  • Harvest in 10-11 weeks.
  • Compatible with (can grow beside): Cucumbers, Melons, Sweetcorn, Squash
  • Avoid growing close to: Potatoes

Your comments and tips

07 Jul 21, Liz (New Zealand - temperate climate)
If they survive the move and don't have too much root damage, then water every two to three days. to keep the roots damp but not swamped.
07 Apr 21, Donna Mourra (USA - Zone 10b climate)
I'm looking for a sunflower plant for Zone 10
08 Apr 21, Anonymous (USA - Zone 10b climate)
Google a sunflower seed selling website and pick one out.
30 Mar 21, (USA - Zone 6b climate)
I live in Cleveland ohio. Wanted to know if I can grow sun flowers here
03 Apr 21, aurora (USA - Zone 10a climate)
Yes! I've visited Cleveland countless times and I've been to a sunflower field there :)
31 Mar 21, Anonymous (USA - Zone 7a climate)
You can work out your climate zone from the blue tab then go to sunflower page.
05 Jul 20, Ann Carson (USA - Zone 8b climate)
What kind of soil best for sunflowers? I planted afew times that begin growing then rodents eat top of sunflowers. Same as radishes too.How do i solve the problems?
12 Jun 20, Vicki Holley (USA - Zone 9a climate)
Looking for a monthly calendar to plant by for zone 9a. Was hoping to plant something in June? (Try here https://www.gardenate.com/?zone=115) Gardenate
16 May 20, Thelma Jenkins (USA - Zone 7b climate)
Our area has a lot of wind, up to 95 in summer. Get some snow in winter. Would like to plant them along our fenceline around our 1acre. Zone7b.AZ. Any advice will be appreciated.
23 Jun 18, Susie (USA - Zone 8b climate)
When is the last month I can successfully plant Mammoth Sunflower seeds in my zone 8b?
Showing 11 - 20 of 23 comments

Looking for a monthly calendar to plant by for zone 9a. Was hoping to plant something in June? (Try here https://www.gardenate.com/?zone=115) Gardenate

- Vicki Holley

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This planting guide is a general reference intended for home gardeners. We recommend that you take into account your local conditions in making planting decisions. Gardenate is not a farming or commercial advisory service. For specific advice, please contact your local plant suppliers, gardening groups, or agricultural department. The information on this site is presented in good faith, but we take no responsibility as to the accuracy of the information provided.
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