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.
Lolium perenne L. · Perennial ryegrass
RAGT 2n, FR
Brassica oleracea L. (White Cabbage Group) · White cabbage
Nickerson Zwaan B.V. (NL)
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Syngenta Seeds B.V. (NL)
Lolium perenne L. · Perennial ryegrass
DLF SEEDS A/S
Helianthus annuus L. · Sunflower
KWS, D
Secale cereale L. · Rye
Peer Wilde^^^Brigitta Schmiedchen^^^Jutta Menzel
Lolium perenne L. · Perennial ryegrass
GERMINAL IRELAND LTD
Lolium perenne L. · Perennial ryegrass
GERMINAL IRELAND LTD
Festuca rubra L. · Red fescue
BARENBRUG HOLLAND
Malus domestica (Suckow) Borkh. · Apple
Trifolium incarnatum L. · Crimson clover
Oregro Seeds
Zea mays L. subsp. mays (Sweet Corn Group) · Sweet corn
HM Clause, USA
Festuca ovina L. · Sheep's fescue
D J Van der Have BV (NL)
Lolium perenne L. · Perennial ryegrass
GIE de Recherche Europeenne sur les Gazons (FR)
Cucurbita pepo L. · Field pumpkin
HM.CLAUSE
Lolium x hybridum Hausskn. · Hybrid ryegrass
DLF Seeds A/S, Dansk Planteforedling (DK)
Glycine max (L.) Merr. · Soybean
VIDIC MILOS / DORDEVIC VUK
Prunus persica (L.) Batsch · Peach
Yamashiro, Hideo P.|Parlier, CA
Allium cepa L. · Onion
Bejo Zaden, NL
Cucumis sativus L. · Cucumber
RIJK ZWAAN Zaadteelt en Zaadhandel B.V.
Brassica oleracea L. (Red Cabbage Group) · Red cabbage
Syngenta Seeds B.V. (NL)
Festuca arundinacea Schreb. · Tall fescue
Z Seeds, LLC and Rutgers, The State University of New Jersey
Brassica oleracea L. (White Cabbage Group) · White cabbage
MEINDERT BOON
Lolium perenne L. · Perennial ryegrass
PURE SEED TESTING