Growing Sunflower

helianthus annuus : Asteraceae / the daisy family

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

(Best months for growing Sunflower in New Zealand - cool/mountain 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

02 Mar 17, Bella (New Zealand - temperate climate)
Hi Yesterday I scraped out a handful of sunflower seeds from a plant in a friends garden. I have them in a brown paper bag. Can I plant them today or do I need dry them out before I plant them. Thanks
03 Mar 17, John (Australia - temperate climate)
You would probably be better to buy a packet of seed or get a small handful from a produce store (they would likely give it to you). The seed you have may not be sufficiently dry and is likelt to rot. It is getting late to plant sunflowers unless you are in the warmer north of the country. Save your seed for next season or swap it for something else. Trust this helps.
Showing 11 - 12 of 12 comments

When should I plant Mammoth grey stripe sunflower seeds? I live in Southwest Florida and the temperature can range from 32 for a few hours during the winter with highs in the mid to Upper sixties but starting in April the temperature goes into the 90 +range. Should I plant them in October or November 4 a January crop or plant them in March for a May crop? I don't want them to burn and I don't want them to freeze. Please help. Thank you and I am glad to see that the friends in South Africa are also in the same predicament as I am.

- Carol Graf-Haslam

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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. GardenGrow 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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