Sep 11, 2015 10:33 AM CST
Name: Deb
Planet Earth (Zone 8b)
Region: Pacific Northwest Million Pollinator Garden Challenge Garden Ideas: Master Level
How do you protect plants which are marginally hardy to our area? The ones I would like to over-winter, if possible, are cedronella (8b), lemon verbena (8a), and curry plant (8a). All should be hardy for me, but I've never had much luck carrying them over and end up buying new stock in the spring. Last year I stuck fir twigs around them and filled with leaves. Lost them all. Maybe I need to cut them back hard in the fall so there is less plant exposed? I suppose I could dig them up and put them in the barn for the winter, although I'd likely forget to water them. Any other ideas?

I want to live in a world where the chicken can cross the road without its motives being questioned.
Sep 11, 2015 12:47 PM CST
Name: Julia
Washington State (Zone 7a)
Hydrangeas Photo Contest Winner 2018 Garden Photography Region: Pacific Northwest Celebrating Gardening: 2015 Forum moderator
Plant Database Moderator I was one of the first 300 contributors to the plant database! Dog Lover Sempervivums Container Gardener Foliage Fan
I wonder if the wet is more harmful than the cold. Can they be planted under an eve of a dry place? Never had any luck over wintering Lemon verbena even in the greenhouse.
Sempervivum for Sale
Oct 7, 2015 3:14 PM CST
Name: Linda
Bellevue, WA (Zone 8a)
Maybe repeat what you tried last year, with one addition...try covering the soil around them with plastic and mulch with leaves (could also use landscape staples or rocks to hold the plastic down), then add your 'leaf surround' to protect the stems. The winter wet is often even more damaging than the cold. This is what I do for my cannas and bananas (I never dig my cannas).

Hope this helps Smiling
Avatar for Oberon46
Oct 8, 2015 2:23 PM CST
Name: Mary Stella
Anchorage, AK (Zone 4b)
Dahlias Canning and food preservation Lilies Peonies Permaculture Ponds
Garden Ideas: Level 2
I have a rhododendron that I cover each fall. It isn't the cold that hurts it but the wind and sun. It would decsicate (sp) if I didn't protect it. I bought a very expensive cover from Lee Valley that was tall enough and had a zipper on it. It isn't terribly tough as I tore the bottom a little when I was trying to free it from the ice but other than that it worked well.
Oct 8, 2015 3:54 PM CST
Name: Kate
A few miles west of Deary, Ida (Zone 5a)
I've had good results most years planting in-ground under the eaves on the protected side of the house. However, you have to pay close attention to moisture needs during the winter. The other way that has worked was to dig up the plant, replant in a large black nursery pot, place that pot inside another pot (or garbage can) surrounded by bark on the sides for insulatory purposes. Site this under the eaves, and protect with a layer of row-cover. Again, the roots need to be kept moist during the winter.
A friend of mine used to wrap her bananas with a blanket then surround with bubble wrap - looked other-worldly, but worked well.
Moisture is the enemy. Sometimes you can avoid crown/root rot by amending the planting hole with pumice or granite chips, particularly around the crown, which I tend to plant slightly above the soil line. The plant may top-kill, but the roots live & the plant rebounds the following spring. Our problem here tends to be freeze/thaw related, splitting the trunk or stems.
Oct 8, 2015 6:34 PM CST
Name: Deb
Planet Earth (Zone 8b)
Region: Pacific Northwest Million Pollinator Garden Challenge Garden Ideas: Master Level
Thanks all. I'll revise my winter protection to focus more on preventing root rot - hopefully that is the key. All the plants in question are supposed to be hardy to my zone, but they sure never are.
I want to live in a world where the chicken can cross the road without its motives being questioned.
Oct 9, 2015 11:25 AM CST
Name: Kate
A few miles west of Deary, Ida (Zone 5a)
I don't know of any fellow gardeners that have been successful with overwintering Lemon Verbena, greenhouse or indoors.
She sulked inside the one year, even under my T5 lights...such a Princess, she is!
Have you read anything substantive about this coming winter weather? There seems to be a conflict of opinion between meteorologists.
I'll err on the side of caution, though & try to figure out the best way & best siting for my borderline plants.
It was never an issue on the Sammamish property, as I knew all the micro-climates. Plus, I didn't have to worry about any neighbours viewing my funky but functional shelters.
No room at this current location, but there are some rather extended eaves along the back. Might work well.
I detest losing plants.

Anyone else have success with overwintering borderline plants without a GH?
Avatar for daisymv
Jun 11, 2016 11:43 PM CST
Name: D
I'm supposed to be in zone 7 here in Victoria, BC.

Last winter I put my potted lemon verbena beside the house, north side. It got a little rain in that location, not much. I had cut it back to about 8 inches.

It came back this year. Beginner's luck?

My sister-in-law has her potted lemon verbena on her north-facing deck under a roof, it has come back at least once that I know of. She lives on the mainland and they have similar weather, maybe a little wetter over there.

I guess the slight protection of being beside the house, north-facing and under an overhang helped. And not being too wet in the pot.

Hope you try again, Deb!
You must first create a username and login before you can reply to this thread.
  • Started by: Bonehead
  • Replies: 7, views: 1,925
Member Login:

( No account? Join now! )