Zone 7b 5F to 10F. Any later than that and your sunflowers may not have a chance to grow to maturity. Zone 6b-5F to 0F.
sunflower plant zone.
The last month that you can plant sunflowers and expect a good harvest is probably August.
Zone 8a 10F to 15F.
Most sunflower varieties bloom for several weeks in midsummer.
Apr 11 2011 They grow best at temperatures between 64 and 91F 1833C but you can plant at slightly lower temperatures once the last frost has passed.
The seeds of the sunflower plant germinate in the spring or summer when the soil temperature reaches 70 to 85 degrees Fahrenheit.
The giant or Russian varieties are preferred for seed production.
Jan 13 2021 Because they need only between 70 and 100 days to reach maturity gardeners in US.
Sunflowers do not like to be transplanted so are best grown direct from seed.
Avoid growing close to.
Apart 30-45 cm depending on the ultimate size of the plant.
Figure out how cold it gets where you will plant them then shop in your hardiness zone.
It was a dry season but we watered daily.
The second plant has a couple blooms only and looks awful.
The plants are in a flowerbed on a slope where they get plenty of sunshine.
North Carolina USDA Hardiness Zone Map.
Zone 7a 0F to 5F.
However you really should wait until May if you dont want to take any chances.
Space seeds about 6 inches apart in a shallow trench between 1 and 2 inches deep.
If planting in rows youll want 2 to 3 feet between each row.
10 rows Dec 25 2019 USDA Hardiness Zone.
Deep 60 cm then rake over and firm.
North Carolina 1990 USDA Hardiness Zone Map.
Department of Agriculture plant hardiness zones 2 and above can all grow them even where summers are short.
Jul 14 2020 If youre seeking sunflower seeds to plant and youre low on space or you really like cute things annual dwarf sunflower plants various.
You probably dont want to wait any later than that or else your sunflowers may not have a chance to really do well.
12 rows Sunflower common sunflower.
Feb 13 2020 Common Name.
Deep 25 cm and 12-18 in.
8 rows Caring for Sunflowers.
While the plant is small water around the root zone about 3 to 4.
The earliest that you can plant sunflowers in Zone 6b is April.
The last month that you can plant sunflowers and expect a good harvest is probably August.