Redbud tree seedling with grey/brown spots

Hi everyone happy new year !!!!!! I have a little redbud tree or cercis canadensis and he have grey brown spot on his leaves is it a mildew or a type of fungus?? Here’s some photos thank you so much
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I see from an earlier post that you live in Canada. Most people on this forum live in Europe and I think that you are our only Canadian. It is difficult to suggest what might be the problem as your fungi and pests may well be quite different from ours.
If I were you I’d ask your question on a Canadian forum.
Good luck.
https://ask2.extension.org/kb/faq.php?id=729383
Happy New Year to you too
I have a polyscia that got similar marks on a few leaves last winter. I put a few slug pellets on the top of the compost and the damage stopped.
Mine is a houseplant, but it goes outside now and then in the summer for some fresh air and rain. I'd guess the little bugger sneaked in then.
Wisdom is not putting it in a fruit salad.
I'd just keep it as you have been doing and as the days grow longer and it warms up it should sprout into growth again.
See how it fares.
But if you have 2-3 slug pellets - there's nothing to lose.
Wisdom is not putting it in a fruit salad.
I'd guess that seaweed extract would be ideal for it during the growing season - just a little every 2-3 weeks.
If you don't' have that any gen. purpose liquid fertilizer will do, but only when it's growing.
Go lite on the ferts. too or the new growth may get soft and you want a nice sturdy tree.
Best of all get it outside when it warms up so it can enjoy the breeze, rain and sun
Wisdom is not putting it in a fruit salad.
We've still got a couple of months to go too until we get decent daylight and a some warmth. Then it starts to get very busy in the greenhouse and garden.
Wisdom is not putting it in a fruit salad.