How Do I Get My Horse Chestnut Seedling To Keep Growing?

Question

Hi! ?‍♀️ I followed the information on your blog and was able to germinate a few horse chestnut trees. They grew like crazy in pot for about a month. I transplanted them in April and they haven’t grown since. I’m not sure what to do. Is it because they were transplanted into bigger pots? I’ve tried adding miracle grow and recently I have tried exposing them to a grow light in the evening. Do you know of any tricks or tips to get them to continue to grow? I have been working on this little project since October and feel bad that they are not doing well. I have attached a picture of one of them as well. This one has brown spots because I under-watered it once. Sincerely, Jodie

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Answer 1

Unfortunately, this looks to be more related to overwatering, than underwatering. When moved to a larger pot, much of the soil is uncolonized. This will mean less evaporation.

I would treat with a fungicide, and be sure to let the soil dry out, thoroughly, down to about 1/3 of the way down into the container, at least, between waterings.

https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm

https://www.gardeningknowhow.com/ornamental/trees/horse-chestnut/potted-horse-chestnut-care.htm

https://www.gardeningknowhow.com/ornamental/trees/horse-chestnut