Caring for tall purple asters.

Question

What can I do about leaves turning brown and dying at the bottom of the long stems?

Answer 1

This can be quite common, the lower leaves are older, receive less sunlight and are just aging.

If you see yellowing, this could be watering issues; either too much or too little.

Here is a link to refresh you on the care requirements.

https://www.gardeningknowhow.com/ornamental/flowers/asters/growing-asters.htm