Sunflower Plants

What is the cause of this on my sunflowers

Zone 97801 | KynKyn10 added on August 21, 2018 | Answered

This is my first year growing sunflowers, and I planted several varieties, a few of them have these hard brown tops!

    A.Answers to this queston: Add Answer
    Certified GKH Gardening Expert
    Answered on August 25, 2018

    This appears to be a severe fungal infection. You can try to amend the area with dolomitic lime and wettable sulfur, but you might not see any results until next year. It will be best to plant them in a different place next time, until the soil has time to cure with this treatment.

    This article will give you more information on the care of these plants:

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