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Growing Sunflower

(helianthus annuus)

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
P             P P P P P

(Best months for planting Sunflower in Australia - temperate regions)

P = Plant direct in garden where they are to grow.


  • 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 - 30 cm apart
  • Harvest in 10-11 weeks.
  • Compatible with (can grow in same bed): Cucumbers, Melons, Sweetcorn, Squash
  • Avoid growing in same bed: Potatoes
  • Young plants

Your comments and tips

26 Apr 10, Jennifer (Australia - temperate climate)
I had a few questions about planting sunflowers; just by reading others' comments I now have the confidence to give it a go. Thank you so much for this site!
19 Apr 10, C lee (Australia - temperate climate)
Stephen sunflowers wont react too good if u transplant so i would recommend just pulling out the weakest ones and letting the strong ones live.
19 Feb 10, stephen (Australia - cool/mountain climate)
Garden centre seeds were too expensive so I planted a whole heap of sunflower seeds which we buy from the supermarket for our cockatoo. Now I have got heaps of seedlings all very close to one another. Should I thin them out by transplanting or by pinching out? And what do you reckon is the minimum space I can leave between seedlings. Thanks
26 Jan 10, Chris (Australia - cool/mountain climate)
Taryn, in sub-tropical areas they should last well into autumn. You can plant now (January) to ensure they will grow through autumn, and start planting again in early spring.
25 Jan 10, TD1 (Australia - temperate climate)
My sunflowers grew 6-7 foot, now im not sure what to do with the heads to retrieve the seeds?
20 Jan 10, funkbunnt (Australia - temperate climate)
Ian Robertson I have grown a 3m tall sunflower this yeat with 30 flower heads! Im niot sure what the trick was - it was planted in November as a seeds in a spot near the potato bed which had been well manured with sheep poo!
16 Jan 10, Celina (Australia - temperate climate)
We planted sunflowers in late January last year and they still came up, our first crop has just finished and we are about to plant some more, one head will give you about 500 seeds so dont buy any more 3kg bags for the birds if you have planted in 10 plants, to stop the bird put a paper bag over the top of the head to collect the seed
11 Dec 09, Taryn (Australia - sub-tropical climate)
will they survive autum and spring i know they won't survive winter and they will survive summer but what about autum and springe!
11 Dec 09, Taryn (Australia - sub-tropical climate)
peoplez don't plant the sunflower withs no shell plant the black ones (NO white ones!!!)
17 Sep 09, helen (Australia - temperate climate)
I've heard of people putting an old stocking (nylon type) over sunflower seed heads to deter birds etc from eating the seeds (while they dry on the plant). Not sure if it works. Worth a try I spose.

Post a question, comment or tip about Sunflower

Hello all, i am a high school teacher at urrbrae ag hs down in adelaide. We have a class project to grow sunflowers. I have been allocated a good size plot. I want to make sure i get the correct variety..i want to grow the sunflowers which reach up to 5-6 feet and i would like advice on growing them. we are selling them to raise money for kids cancer and we are making a short film to go with it.

- ian robertson


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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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