I planted some sunflowers a little late. They have flowered and been
fertilised. How will I know whan the seeds are ready?
The petals are off and the seeds seem to come out easily but are still soft
and white.
I am a novice gardener (1st year) living in S.London.

Many thanks

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Tendril
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It's a carrot and stick affair and the carrot is we wont use the stick