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 50°F and 86°F. (Show °C/cm)
  • Space plants: 8 - 18 inches apart
  • Harvest in 10-11 weeks.
  • Compatible with (can grow beside): Cucumbers, Melons, Sweetcorn, Squash
  • Avoid growing close to: Potatoes

Your comments and tips

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21 Aug 22, Jennifer Bozick (USA - Zone 6a climate)
When is a good date to start planting Sunflowers in Kansas 6a growing zone?
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04 Sep 22, (USA - Zone 6a climate)
In the Planting Guide it says APRIL MAY.
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13 Aug 22, Theresa C. Dougherty (USA - Zone 7b climate)
Can I plant sunflower seeds in mid August to get fall sunflowers .? I live in zone 7 b ,I grow them first in side and plant outside .
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27 Jun 22, Ruby (Canada - Zone 3b Temperate Warm Summer climate)
What about growing media
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29 Jun 22, marco (Australia - arid climate)
hi i live on the gold coast Queensland .i planted sunflower from seed around six weeks ago .flowers are popping out now .i live in sub tropical area . plant in a pot first ,let it grow strong then transplant . they are fun to have in the garden .
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23 Jun 22, Cristal Chacon (USA - Zone 8b climate)
I planted sunflower seeds today. Hoping to get blooms by mid August. Do you think this will happen? Or not enough time?
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27 May 22, Harris, Joseph (Canada - Zone 6a Temperate Warm Summer climate)
Where can I buy perennial sunflowers in Quebec or Ontario (preferably Loddon Gold) My internet search, for now, has been unsuccessful - any help will be most appreciated.
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14 Apr 22, Marjorie (USA - Zone 9b climate)
I’m planting mammoth sunflower in zone 9b (FL). I started the seeds in containers and moved them to the ground. For some flowers, I dug holes and filled with garden soil. For others, I planted in the ground, which is sandy. Those seem to be doing okay, too. They get sun from sunrise to sundown. Would you plant them in sandy soil?
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19 Apr 22, (USA - Zone 5a climate)
Sandy soils just require more watering and fertilising.
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05 Apr 22, Stella Vance (USA - Zone 7a climate)
When is the best time to plant sunflowers or any flowers from seed?
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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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