6

Usually when I see button chrysanthemums (the most common kind) and Michaelmas daisies (Asters) labelled as annuals, which they are not, it's because they've been treated with carvacrol (C6H3CH3(OH)(C3H7)) or phosphon-D (tributyl-2, 4-dichlorobenzylphosphonium chloride), or a similar dwarfing agent. Of course, this treatment doesn't last forever, so when ...


6

They really are remarkably hardy, though that can also be enhanced somewhat if you toss some row cover over them, or straw (leaves also work and may be easier to lay your hands on a supply of) around the leeks. It also helps (with the non-leeks, at least) to harvest when the air temperature is above freezing (even if they have been frozen) at least according ...


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 ...


5

Depends... Standard leeks are very hardy. But there are 'summer leeks' which are not so much. I think if you had those you'd already be seeing a loss in quality. If you know the variety look them up. Mulching them up will help them keep quality and blanch them a bit too - and there should be loads of leave to do this with now. Kale is similar. There are ...


5

No, this will not work. Grafting only works reliably between species/genera,and sometimes between families. Pomegranates are not closely related to apples, so this will not work. Additionally, grafting onto hardy rootstock does not change the vulnerability to cold in the scion. The actual graft area will actually be more susceptible to cold than the rest of ...


5

I think it is possible. You should just find a good place. Near my home (on the other side of the valley) there is two trees (more than 40 years old). Windy situation and not the best place, but in Zone 8b (European standard, so not very continental climate). It seems just that it is not growing fast, but many conifers are so. It seems that Kew gardens (...


4

Yes, Pinus pinea will grow in zone 8 (minimum temperature from -6.7°C to -12.1°C or 19.9°F to 10.2°F), as stated in Conifer Cold Hardiness, section 1, chapter 'Frost Resistance and the Distribution of Conifers' by Bannister and Neuner, page 16, because it stands a minimum temperature of -16°C or 3.2°F. Unfortunately, this tree will not survive in Craiova, ...


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

This sounds like one of Jerry Baker's wacky tonics although even he doesn't recommend detergent except for dish detergent aka regular dish soap. A real detergent will likely harm the plant. While some of his suggestions are odd and I don't think there's much scientific research done on his tonics as a whole there is some merit to a few of his ingredients. ...


3

Basically when soil is dehydrated below 30%, Fe-containing molecules form on organic surfaces, rendering surfaces hydrophobic. Detergents antagonize this acting as a wetting agent. But I'd just drop the whole plant into a bath. http://forums2.gardenweb.com/discussions/1481271/dishwashing-liquid-added-to-plant-water


3

The USDA zone system classify US climate. The real definition is about lowest temperature, but in US the zones are also nearly uniform on climate, so it is used also to describe typical climate range for plants. So with a range and the usual USDA hardiness map, you have an idea of where the plant should grow. Note: it is not 100% accurate, there are always ...


3

Because the USA is a large country, there is a wide variation in weather and particularly average upper and lower temperatures between regions. Therefore, the USDA zone does not only refer to cold hardiness; some plants will not perform properly in too high a zone with its higher temperatures. For example, they may not survive harsh heat in summer, ...


2

I like the idea of living off the grid, but as you can read from the comments your question is too broad to get one straight answer. However, I can direct you to some info, that might be helpful. Like some people commented already, hardiness zone info is not important for most annual crops. So a vegetable garden can be grown anywhere with fertile soil and ...


2

Warm vs Cold Season is a little bit about how much of a sun beating a grass can take, but it's more about temperatures. A warm-season grass might survive the winter, but it'll turn green late and brown early because of the average spring and fall temperatures. I understand that for a lot of the summer, temperatures in "warm-season" areas are only 5-8 ...


2

capital of Bulgaria (Zone 7a), Despite the fact we are in a valley which lies between 550-750 m altitude, we have healthy specimens up to 750 m in a private gardens. It's true that the foot hills of the mountain has higher minimum temperatures compared to the valley bottom since they are over the inversion sink which is prone to colect overcooled air in ...


1

Please keeping in mind, a plants zone hardiness if only what the roots will survive, not whether the leaves, bud or flowers will survive. A good example of this is Hydrangea macrophyllum often rated Zone 4 even Zone 3. In those zones the plant will be killed down to the roots. The plant will survive and grow in spring, but most often fails to produce any ...


1

Inspired by @Giacomo Catenazzi's answer, I searched for specimens of Pinus pinea outside its natural geographic range. Here is a couple of interesting trees that I found: (they are more than 100 years old) Santa Barbara, California, United States Bodysgallen Hall Hotel in Llandudno Junction, Wales, United Kingdom


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