These sunflowers are on my window ledge getting ca 8h of sunlight per day. When they lack water the leaves start hanging dramatically. 30 minutes after watering they correct themselves. Plants look pretty healthy all around to me except for the yellow leaves. I get these on EVERY sunflower I have.

I water them thoroughly as soon as the top 3cm dried up which is around once every 4-5 days. Pots are properly drained.

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Earth specs:

  • Ph 7.2
  • 200mg/l Nitrogen
  • 170mg/l Phosphate
  • 950mg/l Potassium
  • In none of the pictures is what you're growing them in fully visible - possibly the containers are too shallow?
    – Bamboo
    May 16, 2018 at 16:57
  • Containers are same as here, ca 4.5l: gardening.stackexchange.com/questions/38673/…
    – AzulShiva
    May 17, 2018 at 12:08
  • They look like shallow troughs - in which case, your sunflowers need deeper pots.
    – Bamboo
    May 17, 2018 at 18:32
  • Are you sure? They are dwarf sunflowers, only get 50cm tall
    – AzulShiva
    May 18, 2018 at 8:31
  • Not 100% no because I don't know how many plants you have per trough, nor exactly how deep the troughs are, but I'm assuming more than one plant per trough and an average depth of 3 or 4 inches
    – Bamboo
    May 18, 2018 at 9:12

1 Answer 1


Probably the cause is lack of root room, since you're growing them in fairly shallow containers. Pot them up in good sized pots to allow space for good root development.

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