Sunflower, Kong Hybrid
Ornamental Use null
Borders, Cut Flowers
Life Cycle null
Sow Method null
Bloom Duration null
Plant Shipping Information
Sunflowers are grown from seed sown directly in the garden after frost.
- Direct sow seeds in average soil in full sun after all danger of frost.
- When choosing a site consider that sunflowers need a well-drained soil. They face the sun, so make sure they are in an open area of the garden. The taller varieties will cast shadows on other plants, so plant these at the north end of your garden.
- Prepare the soil by removing weeds and working organic matter into the top 6-8 inches of soil; then level and smooth.
- Most plants respond well to soils amended with organic matter. Compost is a wonderful form of organic matter with a good balance of nutrients and an ideal pH level, it can be added to your planting area at any time. If compost is not available, top dress the soil after planting with 1-2 inches of organic mulch, which will begin to breakdown into compost. After the growing season, a soil test will indicate what soil amendments are needed for the following season.
- Sow seeds ½ inch deep in groups of 2 or 3 seeds. Space the groups 18-24 inches feet apart, depending on the variety.
- Firm soil lightly, water and keep evenly moist.
- Seedlings will emerge in 7-10 days.
- Thin to one plant per group when seedlings have two sets of leaves.
- Keep weeds under control during the growing season. Weeds compete with plants for water, space and nutrients, so control them by either cultivating often or use a mulch to prevent their seeds from germinating.
- Mulches also help retain soil moisture and maintain even soil temperatures. For annuals an organic mulch of shredded leaves lends a natural look to the bed and will improve the soil as it breaks down in time. Always keep mulches off a plant’s stems to prevent possible rot.
- Keep soil evenly moist but not wet.
- Once established sunflowers can tolerate drought.
- No fertilizer is needed unless the soil is poor. Do not over fertilize.
- Monitor for pests and diseases. Check with your local Cooperative Extension Service for pest controls recommended for your area.
- Some varieties only produce one bloom so once the bloom is spent, the plant may be removed.
- Remove plants after they are killed by frost in fall to avoid disease issues the following year.
- Edible sunflowers will mature in about 3 months or more after sowing. To harvest the seeds, cut the heads off after the stalks are quite dry but before fall or winter rains come. Check the flower heads for maturity to see if the florets in the center of the flower disk have shriveled and the back of the flower head is turning yellow, or the head is starting to droop. Cut flower-heads with a foot of the stalk attached. Hang heads in a warm, dry, well-ventilated place so the seeds may fully ripen and dry. Cheesecloth, netting or a paper bag with holes punched in for ventilation should be placed over the head to protect the seeds and to collect those that may drop from drying.
- Shorter varieties may be grown in containers. Be sure to use a commercial potting mix.
- Pollenless varieties make terrific cut flowers.
SunFull SunHeight14 feetSpread36-40 inchesOrnamental UseBorders, Cut FlowersLife CycleAnnualSow MethodDirect SowFloweringtrueBloom Duration6
Sunflower, Kong Hybrid is rated out of 5 by 10.Rated 5 out of 5 by agrace from Kong I love this flower and have had great luck with it in the past . This year for some reason my Kong s came up American Giants and they are not as pretty .Date published: 2015-06-13Rated 5 out of 5 by kris911 from Grew just as big as "KING KONG" himself! I first planted these sunflowers along with the Russian mammoth and spikes in my garden during the first week of May in 2014. I planted 3 packets (75 seeds) and these sunflowers fully bloomed to over 14ft by July 28th!! I had 48 massive Kong Hybrid sunflowers in my garden. they bloomed extremely quickly and they were massive. The sunflowers also had little blossoms sunflowers also growing and sticking out all of the stems! When we had that tropical storm with winds 50mph+, I went to bed that night and heard tree branches snapping, garbage cans rolling all over the place and it was nasty weather. So I said to myself that my garden will be destroyed and it was a good garden season and was focusing onto next year. However, I went out the next morning and out of the 48 Kong sunflowers I had in my garden, only one was slightly damaged from the high winds!!!! I didn't even stake them! I was in shock when I saw that. The trunks on these sunflowers are big and strong as tree trunks! My sunflowers made my town's local weekly newspaper which many people stopped in front of my house and asked me about my garden!Date published: 2015-03-22Rated 4 out of 5 by WeezyG from Huge! These sunflowers grew to about 10-12 feet in my garden and the trunks/stems are about 3" in diameter. I mixed them in with my sweet corn, which I think probably wasn't a real great idea because it appears to have affected the pollination of my corn. The tallest plants don't seem to be able to hold up the weight of the flower and they're stooped over. This may be because we've had so much rain here lately that they haven't had enough sun. We had a pretty wicked wind storm a few weeks ago and they stood through it like champs. They really are a pretty flower and the bees love them. The only knock I have against them is the bending over that some of them are doing but that's probably due to the growing conditions we've had here since they started to bloom. I also haven't seen any of the secondary blooms some of the other folks have mentioned but I'm in northern Minnesota so it could be we just have too short of a growing season for that here.Date published: 2014-08-24Rated 5 out of 5 by PacificNW from Tall, very tall sunflower! 12' and still growing! Pacific NW having a sunny summer for once and this flower is growing as advertised!Date published: 2013-07-26Rated 5 out of 5 by Deniseabc from Great Sunflower! I only have one bloom at the present, however, I have numerous flowers in bud that are fixing to bloom. The plant is great and I have enjoyed it!Date published: 2012-05-09Rated 5 out of 5 by BarberBerryFarm from Great sunflower This is the second year we're growing the Kong Hybred and couldn't be happier. One of the things we like about these 12-14 ft monsters is that they also have 15-20 smaller sunflowers growing up and down their canes. They can also handle 30-40 mph wind gusts without an issue.Date published: 2012-05-08Rated 5 out of 5 by grandtetons from Sunflower Jungle! Holy crow! This is THE TALLEST FLOWER I have ever grown!! One of them clocked in at 17 feet! There are 2 things to remember though, 1. Give it TONS of sunlight! Full Sun is absolutely necessary. 2. Give it a lot of water. The germination isn't great, so I suggest starting it indoors in Aprilish- depending on where you live.Date published: 2011-03-30Rated 5 out of 5 by theresa from sunflower I HIGHLY RECOMEND THIS SEED TO ANYONE WHO LOVES SUNFLOWERS AND LIKES TO ATTRACT WILDLIKE TO THERE GARDEN. THE MORE SUN YOU GIVE THIS SUNFLOWER, THE LARGER IT GETS. MINE ARE ABOUT 15 FEET HIGH BUT MAKE SURE YOU SECURE THEM WELL.5 STAR'S TO THIS SUNFLOWER.Date published: 2009-08-07