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6 votes

How to safely keep plants in greenhouse at low temperatures

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 ...
davidgo's user avatar
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6 votes
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How to safely keep plants in greenhouse at low temperatures

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 ...
Ecnerwal's user avatar
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5 votes

How low of temperature can hot pepper plants tolerate?

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 ...
webdoc's user avatar
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How do you grow a plant not in your hardiness zone?

Growing plants in different climate zones can be a challenge. For people in warm climates. The first thing you need to do is make a plan. And research the climate your plant grows in likes. At our ...
David Wisniewski's user avatar
5 votes
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Why don't people cultivate sarana (Kamchatka Lily)?

Assuming, we stick with Lilium medeoloides as the species in question, yes it is "readily grown" according to one supplier and suppliers do exist (in the UK at least). The difficulty I could see is ...
George of all trades's user avatar
4 votes

How to safely keep plants in greenhouse at low temperatures

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 ...
Graham Chiu's user avatar
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4 votes

Why don't people cultivate sarana (Kamchatka Lily)?

Gardeners are very utilitarian people. We like to see a good return for the effort expended, and we look after our needs before our wants. The staples such as beans and potatoes and corn produce well ...
Colin Beckingham's user avatar
4 votes

Can I grow a fall-winter flowering witch hazel bush in Zone 6?

Should be fine where you are, provided you don't plant it somewhere that dries out frequently. It likes reasonably moist, well drained soil, and tends to flower better in sun than shade. Flowering is ...
Bamboo's user avatar
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4 votes
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How to protect pea plants from cold?

I live in Wisconsin, where we also plant when the temps can get below freezing, and I think that you're right to be concerned - 9 F is awfully cold for your plants—according to this sustainable ...
Jurp's user avatar
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3 votes

Why don't people cultivate sarana (Kamchatka Lily)?

I agree that Kamchatka lily is Fritillaria camschatcensis - assuming that's the plant you mean, it requires acid, humus rich soil that is well drained but never dries out, and relatively shady ...
Bamboo's user avatar
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3 votes
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Building Gothic High Tunnel (Elliot Coleman style) in Alaska

There is 28 pages of guidance with many images at Building the Gothic Modular Moveable Tunnel Designed By Eliot Coleman at Four Season Farm courtesy of Johnny’s Selected Seeds. It is both copyrighted ...
pnuts's user avatar
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3 votes
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How to protect a lawn against frost?

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 ...
kevinskio's user avatar
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3 votes

How to safely keep plants in greenhouse at low temperatures

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 ...
Helene's user avatar
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3 votes

Permeable paving in cold climate

There are concrete grid and grass systems, if it's the plastic you don't like. This page claims that porous asphalt systems stand up to freezing better than normal asphalt, and stand up to salt ...
Ecnerwal's user avatar
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3 votes
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Cold Weather Trees with Buttress Roots?

The Dawn Redwood (Metasequoia glyptostroboides) has buttress roots, and can survive in USDA zones 4-8. (image source) (image source)
csk's user avatar
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2 votes
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What is this perfumed arbust and can it survive deep frost?

It's Trachelospermum jasminoides, an evergreen twining climber. Unfortunately, its only hardy down to -10 degC as a minimum temperature, so if your winter temperatures regularly fall lower than this, ...
Bamboo's user avatar
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2 votes

Permeable paving in cold climate

Throughout Northern Europe, Scandinavia and Great Britain the go-to paving solution for drastic weather variations is a combination of porphyry and a mortar called GftK. Porphyry (ancient greco-roman ...
Nic's user avatar
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2 votes

How to protect a lawn against frost?

I don't know what frost is like in Australia, sadly...but here it is a big deal for lawn grasses. The deal is to NOT WALK ON YOUR FROSTED LAWN. This breaks the blades and crowns and if your grass is ...
stormy's user avatar
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2 votes

Can I grow a fall-winter flowering witch hazel bush in Zone 6?

As general way to get an answer (but not really an answer). Botanical gardens or some good public gardens can give you a lot of ideas. Usually they have also some flowers for winter, and usually also ...
Giacomo Catenazzi's user avatar
2 votes

Will the worm population in my raised beds be OK during cold or hot weather?

You'll be fine Kavi! 3' deep beds? What did you use for their structure? Bigger question is; are your beds connected to the original soil? Did you break up the surface of this soil before back ...
stormy's user avatar
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2 votes
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Caffeine containing plants that will grow in Germany's climate

Here's one alternative for you: Yaupon (Ilex vomitoria). It's native to the southeastern US (lowest temperature it should survive at is -17 C). According to this map, Yaupon should survive in most of ...
Jurp's user avatar
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2 votes

How low of temperature can hot pepper plants tolerate?

It depends on how much of a risk-taker you are. Temperature for the weather is taken in the air (rather than ground level). It can be colder on the ground, which is why it can frost when it's up to 41°...
Brōtsyorfuzthrāx's user avatar
2 votes

Upright shrub/small tree recommendations for south facing house in zone 3 climate

You might be interested in a publication (#1286) by the Research Branch of the Canada Dept of Agriculture compiled by Sherk and Buckley "Ornamental Shrubs for Canada" 1968. It has a list of shrubs of ...
Colin Beckingham's user avatar
2 votes

Upright shrub/small tree recommendations for south facing house in zone 3 climate

I can recommend a few shrubs, most of which are relatively tall for anything close to a house: Any of the ninebarks (Physocarpus opulifolius). These include the cultivars Summer Wine, Diabolo, Little ...
Jurp's user avatar
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2 votes
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What are hazards of cold weather and frost to tree seeds and seedlings in northern nursery?

I've worked in a couple of zone 4 plant nurseries, and we stored all of our perennials, shrubs and trees outside through the winter. To do this, we stacked the pots at a 45 degree angle. We used ...
Jurp's user avatar
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2 votes

Are azalea plants dead when the leaves turn brown?

Mid November; I estimate roughly a 40 % loss of azalea foliage. The loss is spread over dead bushes, dead branches (starting from the ground) and dead twigs. Recovery growth during the summer was not ...
blacksmith37's user avatar
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2 votes
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Can I move a flat of Spotted Dead Nettle outside in cold temperatures?

No, you would need to harden them off first. The plants inside are accustomed to warmer conditions, and will not respond well to being placed outdoors in much colder conditions; your existing ...
Bamboo's user avatar
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2 votes
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Will cold weather hurt tomato yields this summer?

While things might be better if you had been able to offer them some protection, in general if they survive, they are already at least a week ahead on dealing with transplant shock, etcetera; .vs. new ...
Ecnerwal's user avatar
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1 vote

Will seed potatoes still produce potatoes if they are planted too early?

Unless your containers are very small and the cold was very deep, there is a good chance that the potatoes will be fine. It takes a lot of cold to freeze a container entirely, and even then the ...
Colin Beckingham's user avatar
1 vote

How good are seedlings at bouncing back after cold weather?

Young okra can be damaged by non-freezing cold temperatures, much as watermelon. However, it's not a sure thing that only a few days of cold will kill them (it might set them back and/or stunt them ...
Brōtsyorfuzthrāx's user avatar

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