Too Cold For Perennials?

fredmertz(NW Indiana)October 27, 2008

it's late October in NW Indiana the temperatures are a little below normal. There's a big close out sale of perennials at a local nursery. just wondered what success would I have planting coral bells this time of years

Thank you for reporting this comment. Undo
petzold6596(8b southern NM)

The rule of thumb I have followed with success is: if the plant is stem hardy (no winter die back) you can plant up to 1 month before the first heavy frost, if not, plant before July 4th.

    Bookmark   October 29, 2008 at 9:13PM
Thank you for reporting this comment. Undo
gardengal48

Hardy perennials are not frost sensitive (although they may very well experience foliar die-back) - annuals and tender perennials are. As long as the perennials are fully hardy for your zone, you can continue to plant until the first hard freeze. This is NOT the same as a hard frost and generally results in the soil freezing to some degree (temperatures into the 20's or lower for several days). Soils take much longer to cool than do ambient air temperatures and plant roots will continue to grow until the soil temp drops to around 40F or lower. Make sure you water them in well after planting regardless of weather conditions - dry soils leave the plant much more vulnerable to cold than do well-hydrated soils.

Heucheras - coral bells - tend to be more vulnerable to frost heaving than do many other perennials, so mulching well to prevent this is advised.

I know many gardeners in the upper midwest that continue to plant well into November - you should be fine.

    Bookmark   November 2, 2008 at 8:31AM
Sign Up to comment
More Discussions
Recruiting MGs
How did your MG group recruit you? Or what prompted...
zuni
Age demographics?
I know this is a bizarre question but its something...
celosia92
Distilled water when doing a pH test
I've read that one has to use distilled water when...
woohooman
watering and soil
I have a question about the cause of a layer of green...
oopsadaisy00
Straw Bale Gardening, seems to be taking over the world.
If you think you know everything about Straw Bale Gardening,...
Joel Karsten
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™