Limpopo
TerminatedCrocosmia Planch. · Montbretia
Paul Lewis
Variety traits
Frost resistance of Crocosmia
Crocosmia Planch.
The frost resistance of Crocosmia is determined by its ability to overwinter in the ground depending on the USDA hardiness zone and critical soil moisture, which dictates the necessity of covering or lifting the corms.
In the reference 3 varieties crop Montbretia, where this is mentioned in the description.
The frost resistance of Crocosmia is classified according to USDA zones. Most large-flowered hybrid forms correspond to zones 7–9, while some species of Crocosmia demonstrate hardiness in zones 4–6. The variety 'Lucifer' is considered one of the most resilient and is capable of overwintering in zones 4–5 provided quality covering is used.
Plants can suffer critical damage at temperatures below -5…-10°C. In addition to the temperature factor, soil moisture is an important aspect of winter hardiness, as rotting and decay of corms in conditions of excessive dampness during thaws often become the primary cause of plant death.
In regions that do not correspond to the hardiness zones, corms require annual lifting and storage in a cool, dry place. In borderline zones, for overwintering in the ground, mulching with a layer of at least 20 cm is applied, with mandatory waterproofing to protect against excess moisture.
General information about the subject — on the page Frost hardiness.
Varieties of Montbretia mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.