Help with my Marigold

[Araujowm]

Hi everyone,
It is my first time growing a Marigold plant. It has been growing very well, until 3 days ago. When some leaves started to look yellowish and dried.
I don’t know what is happening to it. Could someone help me to understand it and how to treat it?
I live in Ukraine and my Marigold stay in a southern window, it gets direct sunlight during the whole afternoon and partial shade during morning .

 

[Meadowlark]

Howdy Araujowm,

Here in East Texas we grow lots of marigolds especially bordering the veggie garden. They love full sun.

Yours look good to me but you need to carefully watch against them getting root bound in small pots and they will exhibit the symptoms you described. Easy to check...just lift the plant and check the root system...and transplant if/when it needs it.