Fruits you prefer cold, room temp, or frozen
5 years ago
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Cold Temps this week
Comments (12)I have been thinking about the expected cold temps and wondering what damage, if any, we can expect. WHEN TO EXPECT A FROST: As Randy mentioned above, partly cloudy to cloudy skies are helpful in this situation as they help hold in the heat and may prevent frost from forming. On the other hand, clearing skies may pave the way for a frost. Signs that indicate a frost could occur include these: no visible clouds at sunset and clear starry skies after sunset, little or no wind, a nearly full moon, no ring around the moon, and no frogs singing at night IF they have already been up and singing on previous nights. If the air has felt relatively nice in the evenings and it suddenly feels 'nippy' that is also a good clue, especially if it feels 'nippy' by 9 or 10 p.m. SOME PLANTS WON'T BE DAMAGED: Most native plants can handle a late frost just fine. Many flowering perennials that sprout in the fall and overwinter as small rosettes are also extremely cold tolerant, as are plants that emerge in late winter or early spring from seed sown in the fall or early winter. This includes poppies, larkspur, violas, bachelor buttons, love-in-a-mist, pansies and some cosmos. Herbs that sprout in late winter or early spring, like chamomile, chives, tansy, catnip, etc. can usually handle cold spells just fine. SOME PLANTS MIGHT BE DAMAGED: Some perennials that have already sprouted are more cold-sensitive and would benefit from having a sheet or some other covering tossed over them. This includes hybrid lilies, hostas, delphiniums, mallows, hibiscuses, garden phlox and balloon flowers. Cannas may be susceptible damage but mine have withstood some pretty good temps. COLD RESPONSE VARIES: Every plant is different in its response to cold weather, frost damage or freeze damage. Many plants, including fruit trees, can withstand cold down to about 28 degrees before you will see much damage. The pink and purple flowers on early-blooming magnolias may turn brown and shatter as a result of damage from a late freeze. DIFFERENT FACTORS GIVE DIFFERENT RESULTS: How much cold a plant will withstand varies, depending on the conditions in which it is grown as well as on its own plant genetics. Another factor is how quickly the temperature falls. If the temps plunge dramatically, as they often do with the first 'blue norther' in the fall, you will see more damage because the plants could not acclimate to the sudden dramatic drop in temps. In the springtime, though, the late freezes usually are less dramatic and the plants are better prepared for them. HOW/WHY FREEZE OR FROST DAMAGE OCCURS: When freeze or frost damage occurs it is caused by the formation of small ice crystals within plant cells and the open spaces between plant cells. As the ice crystals grow, they rupture cell walls and this damage results in the plants losing their ability to hold their shape. When that happens here, some people will say their plants 'just melted'. WHICH PLANTS ARE MORE EASILY HURT? Plants that have a higher moisture content in their cells, like impatiens, begonias or portulacas, will usually show the worst damage. Some plants, like roses, are pretty tough and can withstand quite a bit of cold. WHICH PLANTS CAN SHRUG IT OFF? Cool-season crops like lettuce, onions, spinach and cabbage shouldn't have any damage at the temps we're expecting this weekend. Many plants that suffer less damage have higher salt levels in their cells, as well as lower levels of water. SIGNS OF DAMAGE: If your plants are damaged by the cold weather, you will know it. On warm-season plants the formerly green plant material that is damaged will turn brown or black. Sometimes it will be mushy. You can prune this damaged tissue away and the plant may survive depending on how extensive the damage is. If you're expecting more than one night of cold weather, don't prune away the damage after the first night as it may protect plant material beneath it that is still undamaged. If you have a vegetable garden or row crops in a field, you can see damage from chilling even if your temperatures remain above freezing. The degree of chilling damage varies from plant to plant and is highly dependant on many factors, including soil moisture (which is high here following recent rains) and the relative humidity. When a plant has chilling damage, you will have an increase in ethylene production in the plant. Cell members may leak as they do with freeze/frost damage. CHILLING DAMAGE: Chilling damage can show itself in many ways. Sometimes you see it as leaf scorch or plant yellowing. It may manifest itself as turgor (drooping/wilting of foliage). On some members of the cucurbit family the damage shows up as white areas on foliage where dessication occurs. This can happen on warm-season plants like cucumbers when temps are only in the 40s and low 50s. The plants usually outgrow this type of damage as long as the cold spell is a relatively short one. Sometimes plants that have received chilling damage don't show a lot of physical injury, but will sit there for days or weeks with little growth. They may have a significant yellowing of most of the plant similar to what you see when a heavy rain leaves them waterlogged. Eventually they seem to get over it and begin growing again. FREEZING BACK TO THE GROUND: In the event of a late hard freeze (and we are NOT expecting one in southern Oklahoma this weekend, but I don't know about the rest of you), some warm-season plants that are already in the ground and growing well can freeze back to the ground. Some years I have had tomato and pepper plants freeze back to the ground and still come back from their roots. Sweet corn plants that have sprouted and are growing seem able to take quite a bit of cold. On the other hand, bean plants that have frozen back to the ground generally don't recover. If your plants experience only a short period of chilling they may not show any aftereffect whatsoever. I hope this info helps. Now its just a game of 'wait and see'. Even though we almost always have a late cold spell near Easter, I only see significant damage maybe 1 or 2 years out of 10. Dawn...See MoreSetting Fruit in Cold Temps
Comments (13)Just a few thoughts on the original question of tomatoes setting fruit at low temps. There is a variety, Earlinorth, that sets fruit down to 40 degrees. If you do some serious digging, you can find several Russian varieties that have significant cold tolerance. Also, there are several varieties available in the U.S. that are modestly cold tolerant in terms of setting fruit. I am doing some work with tomatoes to identify genes that contribute to extreme cold tolerance. I currently have 200 plants in my garden for evaluation. This includes Earlinorth, PI120256, numerous U.S. cultivars, and several Russian varieties. So far, I have seen 3 distinct traits involved in cold tolerance. One is the ability to set fruit at low temps, another is improved root efficiency, and a third is leaf tolerance to cold temps. Each trait appears to be affected by different genes. DarJones...See MoreWhen it's cold outside, do you prefer...
Comments (33)We're not using any heat at the moment although we had an electric space heater turned on at night in the living room for a few evenings in November. At the moment it's just after midnight and the temperature indoors is 22C (just over 71F) so it's really comfortable. We sleep with windows wide open summer and winter, unless there's a lot of wind when I have to close them. I put flannelette sheets on the bed in winter and we sleep with feather duvets year round except on the hottest nights of summer. Our bedroom is on a shady side so it's always cool for sleeping. We haven't put on the central heating yet this year as it's been so mild. As we're accustomed to mild weather we become real wimps on the occasional cold spell. (Cold is around 60F for us.) We see the tourists dressed in shorts and flip flops and we (meaning most long term residents) dress in jackets, leather boots and neck scarves. You can tell who are residents and who have come here on holiday by the sharp difference in their clothing on a cooler day. But winter evenings here call for socks, long pants, sleeves and sometimes a pullover sweater. We watch TV with woolen rugs over our legs and cats on our laps and if it turns chilly we may turn on some heat as well. SharonCb...See MoreCold or room temp hors d'oeurve?
Comments (33)Too many danged events in a row, so I've been slow in reporting back. :( Apologies! You all were so very helpful! Thanks to you, I have a much bigger variety of options in my arsenal! Even though there is cheese in it, I went with Mtnrdredux's beet-endive spears. It's mostly not cheese. :) I had both red and white endive, and there was a bag of something at Trader Joe's called "heirloom red spinach" which I'd never seen before. The leaves are colored much like a begonia, with bright red on the bottom and reddish green on top. To complete the picture, I should have done both red and gold beets, but I had leftover beets just using the red. So I alternated endive colors, and added an alternating red/red-green spinach leaf to each one, and they looked really pretty. This is the best picture of a plateful that I could get: The chevre was thinned a little with some vermouth and some white balsamic vinegar, and seasoned with Penzey's Greek seasoning blend along with a salt free garlic pepper blend (this was after midnight before the event I was working and the party, so I just went with what was already mixed and sounded tasty rather than trying to invent a flavor for the occasion. I also added a little chipotle powder and a bunch of dried thyme from a friend's garden. There was a little leftover filling and it was delicious on whole wheat bread. :) I only got a little tester, but I think it must have been good because it all went fast. :) Thanks again to everyone and Happy Holidays!...See More- 5 years agolast modified: 5 years ago
- 5 years ago
- 5 years agolast modified: 5 years ago
- 5 years ago
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LarsOriginal Author