Poliomintha Longiflora

equinecpa(4)October 21, 2011

I acquired one of these plants this year and what a treasure it has been -it has bloomed constantly throughout the heat since the day I planted it and is still blooming.

I believe its winter hardiness is questionable in zone 7? Should I did it up and overwinter it inside? Just cover it on cold days?

I'd also like to take cuttings as I'd like to double or triple my odds of having some that does overwinter. How do you take cuttings of this plant? The stems have so many leaves, would you strip most of the leaves so that you have a 2-3" stem to put in the potting medium? Also what potting medium would you use? Keep moist or let dry? Mist or not?

I'd appreciate any input you can give on either part of my question.

Here'a my post on my blog on this lovely plant:

[url="http://neighborlyplace.blogspot.com/search/label/Garden%20Herbs%20Chickens%20Pests";]Poliomintha Longiflora[/url]

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wantonamara Z8 CenTex

HI, I think I was going to send you some but you found it in your nursery. DG has it rated as Zone 9a . I can attest to it being solidly capable of 8a. I have had 2 8a winters with it getting down to 11 and 12 degrees. and being below 15 degrees for 3 nights running. It came back fine without mulching. Now these were high and dry during the cold. I would mulch well and if it is going to put down a lot of snow at really low temps I would think of putting down a tarp or plastic to keep it from getting soggy. Snow will act as an insulator. It has done three days of freezing rain where it staid below freezing and snowed and it did fine. I would be worried by below 10F . Out of my experience. Take a cuttings and see if it roots. I made my rootings from new sprouts in spring. It might just take longer. Always worth a try. I would rub the leaves off except for the top , dip in rooting hormone and use a sterile medium and once in a while water it with fungicide. I have seen people use vermiculite and have a cute cutting rooting rig. I tend to keep things simple. They rooted easy in spring.

    Bookmark   October 21, 2011 at 10:15PM
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wantonamara Z8 CenTex

I found another hardiness rating as 10 degrees F

    Bookmark   October 22, 2011 at 3:07PM
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Thanks for the feedback. This winter we actually did have a day that hit -F temperatures and some below 10. Not the norm-but that's why I want to be prepared. I'd like to see if I can get a couple of cuttings going and put them in pots outside so that I can bring them in on those really cold nights.

I'm cutting challenged. I've never been very successful with cuttings. How long were the cuttings you took? And how deep did you stick them into the potting medium?

    Bookmark   October 23, 2011 at 12:31PM
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carrie751(z7/8 TX)

Why not dig up some the roots to save, equine? This is what I do with plants that I have not had time to root. It would not need to be the whole plant ........ just some of the roots to keep it going. Worth thinking about.

    Bookmark   October 23, 2011 at 1:01PM
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roselee z8b S.W. Texas

I rooted some a couple of years ago and most of them took. Don't remember whether it was spring or fall. I gave one to Plantmaven Kathy, maybe she remembers when it was.

I took 6 or 8 inch stems and stuck them about 3 or 4 inches into a half gal. pot with approximately half potting soil and half pearlite and covered them with a clear plastic bag, tucking it in around the bottom of the pots. Try both some old wood and some new stems, also try rooting some in a glass of water and see what happens.

Incidentally my two plants made it through the last two extra cold winters with no extra care or protection. Wishing you luck :-) It's a wonderful plant. I'm trying to root some now myself.

    Bookmark   October 23, 2011 at 3:02PM
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ltcollins1949(9a TX)

I have it growing out in one of my beds. It is very pretty, but it froze back last winter even down here on the coast, zone 9. But I had it heavily mulched so it came back from the roots. I don't think that I would leave it in the ground in zone 7.

    Bookmark   October 24, 2011 at 9:33AM
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wantonamara Z8 CenTex

Mine did not freeze back and we got to 11 degrees. Maybe it has been adapted to cold winters. I did have a bit of problem with it on its first winter but clear sailing since. It is 2'high and 4' wide. No watering at all, and it is planted on a high gravely bluff under a cedar tree but it does get western sun late in the afternoon and hard summer sun in the morning.

    Bookmark   October 25, 2011 at 12:10AM
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wantonamara Z8 CenTex

About the length of cuttings. I took it from the soft new growth. about 3" maybe 4". I think I have had success with the wooy cuttings but it took longer and not as many succeeded. Sorry about not answering this right off. I miss stuff.

    Bookmark   November 1, 2011 at 1:05PM
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