Frost Damage–or Disease?

by Kathy Purdy on May 6, 2008 · 8 comments

in Colchicums,Pests, Plagues, and Varmints

Image of pale daylily and yellow colchicum foliage

These plants don’t look too happy, but I’m not sure if it’s the cold that put them in a snit, or a viral infection. Left to right: Daylily 2E, Colchicum giganteum, Daylily 4B, C. ‘Harlequin,’ Daylily 4C, C. speciousum

After nearly two weeks of warm, frost-free weather in April, my garden got socked with a 22 degree (-6C) night. I would like to think these poor plants are suffering from frost damage, but I know streaking in the leaves is a symptom of many plant viruses.
Image of colchicum yellow and brown colchicum foliageImage of bleached out daylily foliage
Please, faithful readers, if any of you have seen plants with this kind of leaf damage and know what it is, I’d love to benefit from your expertise. If you click on either of the above close-ups, you will get a much larger image that may make diagnosis easier.

About

Kathy Purdy discovered the joys of writing in fourth grade, when she started corresponding with a former classmate. She's been writing letters ever since, first on looseleaf, then electronically, and now as weblog entries. That makes you, the blog reader, her pen pal. Her first independent (though frustrating) attempts at gardening were made in high school, though the gardening bug didn't bite hard until her mid-thirties, when she found herself mistress of a rural home on 15 acres. • USDA Hardiness Zone:4 • AHS Heat Zone: 3 • Location: rural; Southern Tier of NY • Geographic type: foothills of Appalachian Mountains • Soil Type: acid clay • Experience level: intermediate • Particular interests: colchicums, narcissus, cottage gardening, NY native plants, gardening with/for children

Even when the future [garden] design is still just a matted clump of dormant perennial roots, it is in our mind's eye the perfect exhibit at the Chelsea Flower Show.
Marylyn Abbott

{ 8 comments… read them below or add one }

Michelle Ferreira May 30, 2008 at 2:20 pm

I’m sorry in that I also agree it looks like frost.

The very purpose of frost is to eliminate the environment of plant viruses and similar. It is nature’s way of sustaining balance, which is not a negative, but a positive and if we see it in that light, it becomes more acceptable & manageable. Here in South Africa (where we are severely under-estimated), we have reasonably affordable, white frost covering, protecting plants & herbs, yet allowing sufficient light. It is not the same material as that used on huge plant farms – more for the home gardener.

It works and is worth it just as much as the therapeutic value of growing for ourselves or even a small business.

Good luck!

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Monica May 9, 2008 at 8:48 am

Twitter: @gardenfaerie

Kathy, how are the plants looking now, a few days later? I bet they will still bloom despite the leaf situation. Let us know!
~ Monica

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kate May 9, 2008 at 1:04 am

Twitter: @katesmudges

Ouch! I am sorry to hear about the frost – that looks like frost damage to me. Hopefully, that is the end of any frost in your area!

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Marie May 8, 2008 at 4:24 pm

Great information! I live in Montana and the weather here is quite hard on plants. I have found that planting small plants in containers and leaving them indoors as long as possible works great. Then it works great to bury the container up to the rim in the desired spot.

With this there is no disturbing the root and that helps the plant withstand temperature changes.

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Ottawa Gardener May 7, 2008 at 8:58 pm

The daylily looks like frost damage to me. I recognize that fainting white colour.

Hope they make a full recovery.

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Carol, May Dreams Gardens May 7, 2008 at 1:24 pm

I’ll “third” what the others said. I think it is frost damage. If it were disease, wouldn’t you have seen signs of it before the frost?

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extremegardener May 6, 2008 at 10:22 pm

My guess is frost, for what it’s worth. I had some similar looking damage a few nights ago on some cauliflower recently transplanted (in northern Vermont).

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Tina May 6, 2008 at 3:59 pm

It sure looks like frost damage to me, but I’m far from being an expert.
I’m sorry they got nipped, but they should look better with a little good weather.

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