Replant it and mound up soil almost to the level of the break. You
might also get a thin strip of duct tape and wrap it (not too tightly)
round the stem. Tying it off to a stake would help too. Good luck,
That looks like an insect gnawed into the stem to deposit eggs,
probably a sunflower stem weevil... if you lash it loosely to that
bamboo stake both sides like a splint (use a piece of wide elastic so
it doesn't cut in) it will probably heal over and be fine (probably be
the strongest part of the stem) but will develop a large gall as the
insect pupa matures. I assume you planted many more sunflowers, so I
would just leave that one it to see what develops, might be
interesting... some sunflower insects are beneficial, they protect the
flower head from other insects.
In my experience, sunflowers have an extremely high mortality rate from all
sorts of causes. Best bet is to plant a lot of them. If you have many and
only one has died so far, you can already consider yourself to be among the
chosen elite. :-) I doubt if 50% of mine make it to adulthood.
Utopia in Decay -- The future is coming to get you.
I didn't read the other replies, but most likely it will not make it
when the heat starts coming on. If it starts wilting, make sure it's
because of lack of water. Don't over water it in an attempt to keep
it alive. I've seen stranger things happen, so I will hope for the
best for you.
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