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
  • Sunflowers
  • Young plants

Sunflowers need full sun and grow best in fertile, well-drained, moist soil with plenty of mulch. Sunflowers do not like to be transplanted so are best grown direct from seed. The giant or Russian varieties are preferred for seed production.

Grow to 1 - 2 metres (4 - 6 ft) so need staking or protection from the wind. Protect seed heads from birds when ripening with nets or paper bags. Chickens love a sunflower head hung for them to peck!

Culinary hints - cooking and eating Sunflower

Use seeds fresh or toasted or press for oil.

Your comments and tips

30 Jun 24, Maureen McGrath (USA - Zone 8b climate)
What's the latest I can plant sunflowers in my zone?
28 May 24, Lisa (USA - Zone 7b climate)
I want to plant sunflowers for table arrangements for a fund raiser Oct 19. What variety would be best for a late planting and when should i plant them for the right timing?
24 May 24, Anonymous (USA - Zone 9b climate)
Is the end of May too late to start sunflowers in Zone 9b?
05 Dec 23, nancy aldape (USA - Zone 9a climate)
I love sunflowers
02 Jan 24, Celeste Archer (Canada - Zone 5a Temperate Warm Summer climate)
Me too.
10 Oct 23, Kathleen (USA - Zone 4a climate)
Not sure if Im in zone 4a or 4b (Ossipee, NH). When should I plant sunflower seeds?
12 Sep 23, Anonymous (USA - Zone 7a climate)
I live in Northern California mountains. Zone 7a. Can I allow mammoth sunflower seeds to drop in fall to winterize before spring?
14 Sep 23, Anonymous (USA - Zone 8b climate)
Maybe you would pick them and store them.
20 May 23, David (USA - Zone 4b climate)
Am in zone 4b. Is there a Sunflower I can plant that only gets 2 feet tall?
06 Jul 23, Brayden (USA - Zone 8b climate)
Botanical Interests has some good dwarf varieties like Sunspot Dwarf that grows 18-24" tall and is good for container planting
Showing 1 - 10 of 38 comments

Hello, I m going to grow some nice sunflowers which are called sunfola (the one used for the oil which has edible seeds)... I know that is not the same but if your client is really ''on'' the sunflower idea, perhaps could he just send seeds? This is just the time to saw them (because we are just coming out the winter in here!) ... sorry :) I buy my seeds at EDEN SEEDS in Australia-. They is the mammoth (big one, over 300mm), the yellow empress, (with a large sized head)and the giant russian. GOod luck!! French living in Qld- Australia.

- florence

Please provide your email address if you are hoping for a reply


All comments are reviewed before displaying on the site, so your posting will not appear immediately

Gardenate App

Put Gardenate in your pocket. Get our app for iPhone, iPad or Android to add your own plants and record your plantings and harvests

Planting Reminders

Join 60,000+ gardeners who already use Gardenate and subscribe to the free Gardenate planting reminders email newsletter.


Home | Vegetables and herbs to plant | Climate zones | About Gardenate | Contact us | Privacy Policy

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.
We cannot help if you are overrun by giant slugs.