Cultivation
Winter covering is an agrotechnical practice for plant protection, indicating a variety's insufficient adaptation to the local climate. The necessity of this procedure shifts crop cultivation into an intensive and labor-intensive format, requiring regular expenditures and strict adherence to work s…
Mentioned in descriptions 14 029 varieties reference book.
The need for winter covering manifests as mandatory annual plant preparation, including mulching, hilling, bending down shoots, or using protective frames and materials. This is a variety marker indicating its inability to independently withstand local climatic conditions, which compels the agronomist to create an artificial environment for protection against frost damage.
Protection effectiveness directly depends on adhering to timelines and the quality of materials used. Early covering at high temperatures can provoke rotting or the development of fungal diseases, while late covering will not protect against early frosts. The success of the operation is also determined by the general condition of the plants: weakened specimens or an excess of nitrogen nutrition in autumn increase the risk of death even when protective structures are present.
Assessing the feasibility of covering relies on economic profitability and agrotechnical capabilities. With the aging of woody and shrub crops, the complexity of installing structures increases, which reduces the scalability of plantings. When choosing a variety, it is recommended to consider frost resistance data and prioritize regionalized winter-hardy alternatives that do not require manual intervention during the winter period.
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
Vaccinium corymbosum L. · Highbush blueberry
The New Zealand Institute for Plant and Food Research
Prunus persica (L.) Batsch · Peach
Laurence Maillard, Arsene Maillard
Lolium perenne L. · Perennial ryegrass
International Seeds Inc. (US)
Rubus idaeus L. · Red raspberry
Vitten Matthias D. / Hamilton Brian K. / Harrison Richard E.
Festuca rubra L. · Red fescue
Euro Grass Breeding GmbH Co. KG
Malus domestica (Suckow) Borkh. · Apple
Michelangelo Leis
Prunus armeniaca L. · Apricot
Maillard Arsene / Maillard Laurence
Solanum tuberosum L. · Potato
R.P.GRAVELAND
Verbena L. · Vervain
Yomo, Y.
Vitis vinifera L. · Common grape vine
United States of America as represented by the Secretary of Agriculture
Malus domestica (Suckow) Borkh. · Apple
THE MAWLEY FAMILY TRUST
Lachenalia Jacq. f. ex Murr. · Cape Cowslip
RIANA KLEYNHANS
Beta vulgaris Sugar Beet Group · Sugar beet
Strube D&S GMBH
Helianthus annuus L. · Sunflower
PIONEER OVERSEAS CORPORATION
Allium cepa L. · Onion
Her Bimsdeboer
Brassica napus var. napus · Rapeseed
Feldsaaten Freudenberger GmbH&Co.KG
Brassica oleracea L. (Cauliflower Group) · Cauliflower
Bejo Zaden B.V.
Lactuca sativa L. · Lettuce
Enza Zaden BV (NL)
Malus domestica (Suckow) Borkh. · Apple
Ústav experimentální botaniky AV ČR, v.v.i. (CZ)
Rosa L. · Rose
WALTHER UHL BAUMSCHULEN
Allium cepa L. · Onion
Syngenta Seeds BV (NL)
Lilium L. · Lily
WIM VLETTER
Petunia Juss. · Petunia
Shinzo Tsuda / Hiroshi Hirabayashi c/o Keisei Rose Nurseries
Prunus domestica L. · European plum