Frost hardy to -5°C (23°F)
Stay in the ground all year, but will need protecting in cold winters. View plant list.
FROST HARDY - Plants that are able to survive winter frosts without damage to their leaves (i.e. evergreens) or damage to dormant stems, buts or roots (i.e. deciduous plants). Very much relative to geographic areas.
The term 'frost hardy' is often misleading because of the degrees of frost (i.e. light frost vs. hard killing frost).
It is a good idea to ask a qualified local nurseryman what is suitable to grow in your area.
Phormium is not reliably frost hardy, so gardeners in cold-winter areas either buy new plants every year or protect them by bringing them indoors for the winter.
Protect bonsai that are not frost hardy by placing them in a protected area. More
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If you're anxious to grow peppers and tomatoes, which aren't frost hardy, and your climate isn't cooperating, you can start them indoors two to three weeks before your last frost-free date. Your local extension service can provide that date.
Temperature: Cyclamen do not like heat, but they are not frost hardy. Do not expose to temperatures below 50 degrees F. Avoid drafts as well as hot, dry air.
Dormancy Period: ...
It is frost hardy, and thrives in full sun to light shade and well drained soils. In summer and early autumn it is covered in small white fluffy flowers. Under some conditions it can be prone to attack by two-spotted mite.
It is an early frost hardy peach adapted to mild winter areas of Texas, and needing only about 450 chilling hours below 45 degrees . . . a heavy fruiting, yellow fleshed semi-freestone type ripening six weeks before Elberta.
Cauliflower is related to broccoli and cabbage and requires similar cultural care, but is more difficult to grow. It is less frost hardy and is best planted right around the average date of last frost.
Acacia
This small tree is grown for its foliage and small flowers. The varieties range from tender to frost hardy and they need full sun and a well-drained soil.
You won't be told if the seeds need light or darkness to germinate, or if the seedlings are frost hardy.
Root Crops can be left in the soil all winter, a plus in Colorado where snows and freezing temperatures can come early. However, they should be removed before the spring temperatures warm up. Most are also frost hardy and will grow if an early fall ...
They are clump forming plants with reed-like stems and leaves that are narrow and arch to the ground. The flower heads are puffy plumes that form in late summer to fall and make good cut or dried flowers. Most species are moderately frost hardy, ...
When the plant is in the seedling stage, nighttime temperatures below 10ºC can cause bolting, so start early crops inside and don't plant out until the nights are warm enough. Radicchio is fairly frost hardy and, in areas with only moderate frosts, ...
 See also: Frost, Hardy, Plant, Flower, Spring
  
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