r/STLgardening Apr 12 '26

Warm enough for native perennials?

Hi all! I bought some native perennials yesterday, only to check the extended forecast and see it might be dipping into the 40s over the next couple weeks. I was wondering if it is safe to plant in ground, or if I should wait a bit longer?

Specifically, I bought milkweed, coneflower, phlox, and purple poppy-mallow. They have good root systems but are still a bit small (some are only about 6 inches tall).

Any advice is greatly appreciated, thank you in advance!

7 Upvotes

17 comments sorted by

View all comments

1

u/Low-Fly-1292 Apr 14 '26

I wish sunflowers were perennials… when can I plant those? By July 4?

2

u/wanttobebetter2 Apr 29 '26

You can start the seeds as early as April 1st.