When to count and measure your sunflowers

Jonathan with thumbs up next to a sunflower head that is ready for measuring and countingIt's time to count the spirals when your sunflower head looks like this & the seeds patterns are clearly visible.

This is roughly 20 - 24 weeks (5 - 6 months) after you planted your sunflower.

This will vary as not all growing conditions are the same but likely to be August, September or early October.

It's not ready when it look like this..

Jonathan with thumbs down next to a sunflower head that is still in bloom and not ready for counting

Or like this...

Jonathan with thumbs down next to a sunflower head with petals that is not yet ready for counting

However at this stage, you can still register your sunflowers and count the number of petals on your sunflower.