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

16 Apr 18, Mike (Australia - tropical climate)
Let the plant die back a bit before cutting the seed head off.
20 Apr 18, Carol (Australia - cool/mountain climate)
Watch out for parrots/cockatoos though! Tie a lightweight fabric bag over the head while you wait for the plant to die back and the seeds to dry
29 Oct 17, Laura George (New Zealand - temperate climate)
Could you please let me know - How big are the flowers on Drawf Big Smile and Primrose Queen F.1. Hybrid, we need them, about the size of a hand, say approx 14cm x 12cm??? For a wedding on 5th February 2018. We were going to plant them around 4th - 11th November, is that too early??? I would really appreciate your help. Thank you Laura
27 Dec 18, Scott (New Zealand - sub-tropical climate)
May depend a bit on the variety of sunflower. Giant Sunflowers grow to a height of 6 feet so they will shade out dwarf beans. Large sunflowers are also gross feeders so will suck up all the nutrients from the soil so ideally need their own space. Hope this helps. Happy Gardening
02 Oct 17, Jan Brand (South Africa - Summer rainfall climate)
What fertiliser is best for growing sunflowers? Do they also need more potasium? Please help!
24 Sep 17, Jaylin Driver (New Zealand - temperate climate)
How long do sunflowers take to germinate?
17 Sep 18, Mike (Australia - sub-tropical climate)
Look up the internet.
24 Sep 17, Philip Rathbone (South Africa - Summer rainfall climate)
Hi. Im getting Married in December and my Fiance wants bunches of Sunflowers for the day. I live in Germiston. Where can I buy Sunflowers
13 Sep 17, Gary Barr (USA - Zone 12b climate)
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
31 Jul 17, Jen (South Africa - Summer rainfall climate)
Hi am I interested in growing sunflowers. I live in Johannesburg, South Africa. It is currently winter but warming up very quickly with Spring coming in September, When is the best time to plant seeds>
Showing 81 - 90 of 166 comments

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