Abersevern
ActiveLolium perenne L. · Perennial ryegrass
Aberystwyth University (IBERS)
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
Aberystwyth University (IBERS)
Lilium L. · Lily
Vletter & Den Haan Beheer B.V
Prunus armeniaca L. · Apricot
SDR Fruit LLC (US)
Euphorbia pulcherrima Willd. ex Klotzsch · Poinsettia
Zerr Katharina
Lactuca sativa L. · Lettuce
NUNHEMS
Prunus armeniaca L. · Apricot
Stephen Southwick & David Decalo
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
Fresh Forward Holding BV, Netherlands
Lolium perenne L. · Perennial ryegrass
CRIADERO EL CENCERRO
Zea mays L. subsp. mays (Sweet Corn Group) · Sweet corn
HM.CLAUSE
Lolium perenne L. · Perennial ryegrass
Grasslands Innovation Ltd
Rosa L. · Rose
HANS JURGEN EVERS (T)
Cucurbita maxima Duchesne x Cucurbita moschata Duchesne
TOKITA SEED CO LTD
Festuca arundinacea Schreb. · Tall fescue
Rutgers, the State University of New Jersey and Novel AG, Inc.
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Alstroemeria L. · Alstroemeria
VAN STAAVEREN B.V.
Lolium perenne L. · Perennial ryegrass
Rutgers, The State University of New Jersey
Malus domestica (Suckow) Borkh. · Apple
International Plant Management, Inc (US)
Agrostis capillaris L. · Common bent
PGG Wrightson Seeds
Poa pratensis L. · Kentucky bluegrass
Novel AG, Inc. & Columbia River Seeds, LLC
Malus domestica (Suckow) Borkh. · Apple
Xavier Simier, Patrick Tessier, France
Raphanus sativus L. var. oleiformis Pers. · Oil radish
KWS, D
Cucumis melo L. · Melon
HAZERA SEEDS B.V., IL
Lolium perenne L. · Perennial ryegrass
PURE SEED TESTING
Lolium perenne L. · Perennial ryegrass
Peak Plant Genetics, LLC & Rutgers, The State University of New Jersey