Korhassi
Protection expiredRosa L. · Rose
W.KORDES' SOEHNE ROSENSCHULEN GMBH & CO KG
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.
Rosa L. · Rose
W.KORDES' SOEHNE ROSENSCHULEN GMBH & CO KG
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Syngenta Seeds
Cucumis melo L. · Melon
Clause Semences SA (FR)
Brassica oleracea L. (Cauliflower Group) · Cauliflower
Sakata Vegetables Europe SAS (FR)
Brassica oleracea L. (Cauliflower Group) · Cauliflower
Rijk Zwaan (NL)
Prunus domestica L. · European plum
Fagopyrum esculentum Moench · Buckwheat
P.H. Petersen Saatzucht Lundsgaard GmbH, Grudhof DE
Lolium multiflorum Lam. var. westerwoldicum Wittm. · Westerwolds Ryegrass
Hodowla Ros. Szyldaku (PL)
Poa pratensis L. · Kentucky bluegrass
Svalöf Weibull (SE)
Helianthus annuus L. · Sunflower
PIONEER OVERSEAS CORPORATION
Prunus persica (L.) Batsch · Peach
Poa pratensis L. · Kentucky bluegrass
DLF Seeds A/S
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Lolium perenne L. · Perennial ryegrass
Innoseeds B.V. (NL)
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Nickerson-Zwaan B.V.
Festuca rubra L. · Red fescue
Advanta Seeds B.V. (NL)
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Zoldesegtermesztesi Kutato Intezet RT (HU)
Lolium perenne L. · Perennial ryegrass
SCHELLER DR.| LD Dr. Helmut Scheller in Bayerische Landesanstalt fuer Bodenkultur und Pflanzenbau / DOBLER| Fritz Dobler in Bayerische Landesanstalt fuer Bodenkultur und Pflanzenbau
Malus domestica (Suckow) Borkh. · Apple
ROY (US)
Phacelia tanacetifolia Benth. · Lacy phacelia
Poznanska Hodowla Roslin Sp. z o.o
Prunus armeniaca L. · Apricot
Washington State University Research Foundation
Zea mays L. · Maize
KWS SAAT SE and CO KGAA
Festuca rubra L. · Red fescue
DLF Seeds A/S
Chrysanthemum L. · Chrysanthemum
Meek, Jack M.|Salinas, CA / Duffett, William E.|Salinas, CA