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Growing Sunflower

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 - 12 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

04 Oct 16, Chris (Australia - cool/mountain climate)
Maybe an F1 hybrid so they won't grow true in following generations?
20 Sep 16, Jaxon K (South Africa - Dry summer sub-tropical climate)
How do i protect the sunflower heads from birds
01 Oct 16, May (South Africa - Summer rainfall climate)
If you want to save the seeds before the birds eat them, you can tie lightweight bags, made of gauze or something that can breathe and allow sun through around the flower heads, though it is not as pretty as having the flowers out in the open. Reflective surfaces that move in the wind and reflect flares of sunlight are supposed to also deter birds, because it irritates them or creates the illusion of fire... I know some people hang old cd's amongst their plants, but I haven't tried it, because again, not so pretty.. Not sure if it works and obviously when it is overcast and there's no wind, there won't be any movement or bright light to reflect.. But maybe worth a try?
13 Apr 16, Susan Stewart (Australia - temperate climate)
Is the sunflower root edible? If so, is it similar to the helianthus variety known as Jerusalem Artichoke?
10 Feb 16, Beverley Hall (South Africa - Semi-arid climate)
What month is best to plant sunflower seeds?
09 Feb 16, linn (Australia - sub-tropical climate)
hi there, i live in broome in north western australia, was wondering when is the best time to plant sunflowers
10 Mar 15, (Australia - temperate climate)
I am trying to grow giant sunflowers from seed I purchased at a reputable seed dealer, I can get a 40% germination rate in seed pots but the seedlings are very leggy and tend to lay down at 7.5cm high. In the ground I did get three to sprout, quite upright about 10cm high but then nothing. No further growth for around around four weeks. What am I doing wrong? Good quality potting soil, slow release in soil and I also use fish emulsion about every 8 weeks. All my other plants in the garden and pots are thriving. Any ideas? Please
04 Jun 14, Reynet (South Africa - Summer rainfall climate)
Good day My daughter getting married in April 2014 \we need 150 sunflowers. when must i plant them. We stay in Pietermartizburg KZN
31 May 14, sherlie eady (Australia - temperate climate)
Im planning a wedding in Perth end of September and would love to have a patch of sunflowers blooming then but when is the right time to plant the seeds and which variety is the most spectacular/easy to grow ?
24 May 14, Anton Marais (Australia - arid climate)
Is the Margeret River area good for the arid type sunflower - I'm from - South Africa where we used to travel down to the coast thro sunflower fields up to 300 to 400 km long - I love them on the other side of the road was gaint corn called a mielies in sa
Showing 21 - 30 of 79 comments

I live in an area with typically 150 - 200 inches of rain (although not this year) and a temperature range of 55 - 85 - but mostly 60-75 degrees. Soil tends to be on the acidic side (volcanic soils) I'm interested in knowing if there are varieties of sunflowers that will grow in these conditions and also are good for honey production. Thanks

- Gary Barr

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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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