Tagged Questions

*Helianthus annuus*. New World annual noted for its large flowering head.

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2
votes
3answers
110 views

Do these sunflower seedlings need to be thinned?

I have two questions regarding the sunflower seedlings in the picture below. I think my sunflowers are too close together. How much should I thin them and based on their height, does now seem like a ...
6
votes
1answer
360 views

What is the best sunflower for seed production in Pennsylvania zone 6b?

I have been growing mammoth grey stripe sunflowers for a while, but I want to know if there is a better producer for my climate. The area I would plant them in is a heavy, clay base soil. The average ...
12
votes
4answers
3k views

Are the seed pods of giant sunflowers normally empty?

So, I'm attempting to harvest sunflower seeds from some giant sunflowers I planted an age ago. Unfortunately, there's nothing inside the seed pods! I believe the sunflower was a 'giant', it may ...
12
votes
2answers
3k views

When should sunflower seeds be harvested?

I've got a few giant sunflowers that are hanging pretty low. I peeled off a few seeds around the outside just to see what they looked like and they look pretty big. They're fairly light though, not ...
9
votes
2answers
1k views

How do I provide support to a growing sunflower?

I am growing sunflowers and they grow quite high, sometimes toppling over. What kind of support can I give to them in this case?