Begonia Cold Hardiness

It is said to be hardy to USDA zone 7 but only for those areas with dry winters as it quickly rots in cold wet soil. So late spring is the best time to plant begonias.

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Wax begonias are of the Semperflorens-Cultorum hybrid group and are derived from a closely related group of South American species that have shown some cold hardiness in USDA zones 8-10.

Begonia cold hardiness. Begonia grandis is cold hardy from zone 6 south. In the cold climates begonias can be stored in the windows that face to the east side. In winter the plant does not need lot of nutrients.

There it is best dug up after it has become dormant and stored like a dahlia. In excess root rot is possible. A friend in zone 9a has had several rhizomatous and cane begonias that have survived.

Once the node have produced new stems winter cuttings can be done. Nelumbifolia described above It should grow in most of zone 9a with protection in the coldest winters. Begonia rex is sensitive to temperature changes and to temperatures below 60 degrees Fahrenheit.

Like most begonias it is an excellent container plant. The Mount Emei begonia Begonia emeiensis and Taiwan begonia Begonia chitoensis for example are winter hardy in USDA zones 7 to 10. Ideally begonias will grow best if they arent exposed to overnight temperatures below 60 degrees.

Other begonia types can be bought as pot-grown plants or plugs. You can find more great begonia species and varieties for the garden here. They grow 12 to 18 inches tall and wide and thrive in part shade to full shade locations.

However it cannot tolerate much cold. You can keep them happy as houseplants or store them dormant over winter as you would with other tender bulbs. Begonia Tuberosa Group hybrids have shown some cold hardiness including the tuberous Begonia grandis USDA zones 6-10.

Tuberous begonias cannot grow in cold soil and any begonia might suffer damage from temperatures below 50 degrees. Begonia boliviensis is a tuberous species that has been making its rounds in the garden catalogs. Like tuberous begonias most fibrous begonias cannot survive temperatures below 45 F 7 C.

It wont overshadow their blooming but can help cover up their yellowing foliage. They grow 12 to 18 inches tall and wide and thrive in part shade to full shade locations. Begoniaceae is a large flowering plant family the name of which honors Michael Begon 1638-1710 Governor of French Canada and includes about 1500.

How to harden off plants. These plants do require high humidity more than 50 percent which means it can be difficult to grow rex begonias indoors over the winter. The typical form has large round leaves with a pale green reverse or with red veins and pale pink or white flowers and come up in spring from a dormant tuber to flower in late summer.

Harden off the plants before planting them out in the garden in May when no further frosts are forecast. It can be recognized as a begonia from July with its delicate pink flowers. Bring your begonias in at night when temperatures fall below 50 F 10 C.

It is based on the coldest climate in which a plant will survive. Begonias grown outside will be sensitive to spring cold snaps so be careful that you dont plant them outside too early. Begonia grandis varieties are cold-hardy plants suitable for Zones 6 to 9.

This is especially true if the begonia plants are not hardened off. The species is considered to be relatively hardy and can survive frosts down to -9 C. Rhizomatous begonias grow and spread via horizontal stems called rhizomes and some rhizomatous species are nearly as cold tolerant as hardy begonia.

For example Penn States extension service puts the low end of angel wing begonia temperature tolerance. If a plant is listed as hardy in zones 5-8 it means that it will withstand the cold temps up to zone 5 but will most likely freeze out in lower zones such as 2 3 4. It emerges in the spring and will drape itself in long-petaled flaming orange flowers.

The plant is only winter hardy to USDA hardiness zones 9 to 11. How to care for begonias after winter. In the coldest parts of hardy begonias range it may not appear until June.

Begonia heracleifolia seems to be as hardy as B. The so-called hardy begonias also need sufficient frost protection. This begonia hybrid species is heat-tolerant and continues to bloom and add color to landscapes even during blazing temperatures.

Begonia pedatifida Begonia Torsa The one BIG exception to Bgrandis hybrids lacking cold-hardiness comes in the form of a cross with a species reportedly from Bhutan and unidentified but which contributes large leaves producing what to all intents and purposes is a Bgrandis on steroids once tubers are mature. Begonias listed below represent types that have proven resilient and usually cold hardy in north Florida USDA Cold Hardiness Zone 8b. You can also buy tuberous begonias as fully grown plants although this is a more expensive option.

Keep a close eye on the weather forecast during the fall and be ready to move your begonia. The zones are divided on this map and numbered. As you might expect in such a diverse family cultivars vary widely in their cold tolerance.

Begonias will begin the following growth phases in early spring. Therefore you can place it near spring-flowering bulbs if you want.

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