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7

The yew bushes in front of the building I work at are flattened by snow and ice every winter, (nobody cleans it off, and if the roof gets cleared, they get extra helpings on top.) They are poorly shaped for snow (trimmed dead flat on top). When the snow melts they are fine (and have been for 20+ years of this.) Therefore, my suggestion is: do nothing, ...


7

Nothing to do with phosphorus levels - the usual explanation is varying exposure. One plant may shield another from the full effects, one might be further into a frost pocket and is thus more exposed than the one next to it, some plants are in a warmer spot to start with (more sun exposure, so the soil is warmer for longer, meaning frost has slightly less ...


6

Adding to @Ecnerwal excellent answer - Draped row covers will provide a little additional support by trapping in more heat - maybe 1-3 degrees c - the key would be to take them off during the day to help heat the soil beneath them. If you look at what hardiness zones plants can be grown in and when you can plant them, that should give you an indication as ...


6

Plants grown warm, indoors, will need hardening off to transition to an outdoor greenhouse that's unheated. One aspect you may not have considered with a "simple greenhouse" is cooking the plants on a bright, sunny day - an unventilated greenhouse can become a solar oven. There are unpowered wax-based automatic vents, or else you need a person on the job ...


6

First, a word on how USDA Hardiness Zones are determined. USDA Hardiness Zones are based on the Average Annual Extreme Minimum Temperature. So, the average of the coldest temperature on the coldest night, that's where we're looking at. If you're thinking that's around -3.5 to -5 C that likely puts you in Zone 9a according to this map The shelter is adequate ...


6

First, your comment that its still snowing - don't even think about cutting back the gardenias until you are more or less certain that winter, and its cold temperatures, has passed, so don't do it now. You need to wait till spring starts properly, whenever that will be, without the risk of sudden cold snaps recurring. When you've got to that point, check ...


6

Nothing is generating heat on or within the fruit - the paper bag acts as an insulator so that if/when the temperature drops (possibly overnight or whatever) the fruit is more protected than it would otherwise be if it were not bagged. Paper is a very good insulator, sealed at the top or not, and in this case, there's a gap between the fruit and the bag ...


5

Tomatoes are on their own roots. If they are sprouting new leaves and branches they will be fine. Just work on making sure they don't freeze again. This is true of virtually all herbacious plants btw. For woody plants if they are on their own roots, again you are usually ok but if they are grafted the leaves and branches are from the rootstock rather ...


5

Although it won't hurt the yew for the branches to lay down thusly, indeed this is how many confers grow naturally anyway is to spread out after grow up first. They may not lift back up. The hole will fill after a few years but you may not want to wait. After the thaw, wrap the yews with twine and lift the branches back to where you want them and let the ...


5

They should be fine as long as it doesn't actually freeze. I grow them in Montana and they are very susceptible to frost, but only if it actually frosts. If the peppers are touched by frost, they get soft and mushy.


4

These yews are going to be fine. Cut any broken branches back to a healthy main stem. Lop off ends to relieve weight. Not a great idea to use twine at this stage as that would act like a cast on one's arm, atrophying and weakening the branch. When pruning for a hedge, I am assuming this is what you are trying to accomplish, keep the top narrower than the ...


4

Yes, it's safe. Spoilage in vegetables that have had "too much" frost is obvious -- e.g. spinach leaves will be discolored or mushy. Classic advice is to let parsnips overwinter, so that the cold weather makes the plant convert starches to sugars. This works with carrots too, though if they experience too many freeze/thaw cycles, they'll turn to mush (in ...


4

Had they sprouted yet? If they were still in the soil, they are probably fine (for frost, not freeze.) If they had sprouted (to the point of being above soil), you'll probably see the tops die and should replant.


4

As a resource you can consider Eliot Coleman's The Winter Harvest Handbook: Year Round Vegetable Production Using Deep-Organic Techniques and Unheated Greenhouses which discusses growing in unheated greenhouses, and the use of floating row covers to provide extra protection against sub zero temperatures. This was a method pioneered by Prof Emmert in the ...


4

Edible Tree Crop Farm was Dick Robert's pioneering permaculture site in Nelson, NZ before the term existed. A sub tropical climate was created with the use of North (equatorial) facing hillsides, ponds for thermal mass and heat reflection, wind breaks to divert cold winds, rocks etc. A description of micro climates can also be found here. https://...


4

Trees vary widely in leaf-out time, oaks are a long-lived species that plays it very safe in order to not die out due to a warm spell. Factors influencing leaf-out include: Warm, sunny location, such as a south-facing hill (will leaf-out earlier) Cold, shady location (will leaf-out later) White Oak is among the last species to leaf out. Oak needs a ...


4

It's a complicated subject, and to some extent, depends where you are and what sort of grass you're growing. In the UK, I might cut grass in early January, if it looks like it needs it - but only if the weather is temporarily mild, or at least above 5 deg C during the day - if a frost forms that night, so long as the temperature doesn't fall below -2deg C, ...


4

You don't say what part of the world you're in, but this is more of a problem than it once was in many parts of the northern hemisphere, and there is little you can do about it. It's because of climate change - temperatures fluctuate in parts of the northern hemisphere quite naturally during winter, but that fluctation is now greater and less predictable ...


3

I have gardened for years,too many to count. The most success I have had has been to keep the greenhouse area above 10 celcius at night, water your plants so they do not take up all the moisture when sweating. That's what causes them to freeze.keep them off the ground as it is colder there.I run a fan during the day so they get used to a breeze and makes ...


3

Grass is not normally sensitive to frost and is not burned by the sun due to frost crystals. That is because when temperatures are low the plant goes dormant. More information is found here where the only issue seems to be a sensitivity to herbicides. This turf supplier in Australia notes that is cold tolerant down to -10 Deg C in Canberra. As long as ...


3

Now we come back to your other question, which mint have you got. All mint varieties commonly available are hardy in your USDA zone, except one, which is Mentha x piperita vulgaris, common name Black Stem Peppermint, which is hardy from Zone 6 upwards. This one has almost purple stems with dark green, oval leaves which have a small, toothed margin. If you ...


3

If you're asking whether the soil in your potted trees is better being damp when you know cold weather is coming, yes, it is, so watering if necessary, preferably in the morning to give the plants time to take up the water, is a good idea. Frost damage can still occur on newly opened, young leaves, but frost and freezing are not always the same thing - there ...


3

Sunflower plants are not frost tolerant, but the seedlings are, they will tolerate down to -3deg C at the cotyledon stage for a brief period; that is why the suggestion to sow 2 weeks before the last frost date is made, because it's unlikely the seedlings will be any size at all if there is a frost and will therefore survive. But once they become small or ...


3

When your grass crop looks frost covered, do not step on it. You will easily kill the crowns of some of the grass species. I've seen the footsteps of dead grasses where an owner walked out on his lawn when there was frost. Even just freezing temperatures during the early morning hours could freeze the crowns of your grass without 'frost' appearing on the ...


2

To piggyback on Chris Travers' answer, if you are seeing new growth then that's good news. I would expect it to recover if you are seeing new growth. Typically the late frosts we receive after our average last frost date aren't so severe as to kill the plant completely. As to your follow-up question. I tend to take the position that the dead/damaged ...


2

You're a bit colder than we are in the UK (well, usually) but I'd leave the plants where they are if it's too difficult to move them, stop watering as winter arrives, and use cheap wood (wooden fruit pallets if I can get hold of them) fixed together to create a sort of 'box' around the pots. The 'box' should be a few inches higher than the pots, and about 6 ...


2

You cannot keep the root ball from reaching outside air temperature but you can reduce wind chill and exposure to fluctuating temperatures. Consider these ideas: relocate the plant and pots to an area sheltered from the prevailing winter winds avoid locations exposed to point heat sources from the building. (ie not outside the exhaust from a dryer vent) ...


2

In addition to finding this question when looking into this, I came across an article from the University of Illinois Extension, which had some relevant information: Probably the concern over eating produce after a freeze goes back to one plant – rhubarb. [...] We eat the rhubarb stalks and should never eat the large leaves any time of year. The leaves are ...


2

I've developed www.ifweather.com for managing custom weather alerts and sending email just like you describe. It isn't free, but it's the best option for managing many alerts for more than one location that I've found. It currently has the ability to watch the forecast for temperature and precipitation conditions. When the conditions you specify are ...


2

If they get hit by frost, they will go dark, translucent, and mushy. In a while they will dry off and shrivel. If alive, they will remain rigid, and slowly increase in size as they grow. If you can magnify them and get a better look, that would help. If you're still in question, wait a week and note any differences. If they haven't shriveled atall, they're ...


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