Wallflowers - Erysimum - Cheiranthus - Erysimum cheiri 'Dwarf Bedding Mixed' - Gulltoppur - Krossblómaætt - Brassicaceae - Nafnið Krossblóm vísar til þess að blóm þessara jurta bera fjögur krónublöð. Wallflowers are hardy and tough, though prolonged frost may weaken the plants. After a frosty night, you may notice drooping leaves on your plants – particularly if it is subsequently windy. This is a reaction to the weather conditions and the plants will perk back up, remaining healthy.

Erysimum hieraciifolium.- Mývatnsdrottning
Erysimum strictum - Aronsvöndur.

Wallflowers bring dazzling colour and fabulous scent to your garden in the spring. Wallflowers are one of the most reliable winter bedding plants and are happy wherever they’re planted. They are hardy plants, surviving frosts and harsh winters with temperatures of minus ten. Wallflowers were found growing naturally on sea cliffs and walls – cultivated varieties have become a sight and scent essential to the cottage garden. The flowers are fragrant, varying in colour between yellows, reds, oranges and pinks. They’ll grow to a height of between 20 and 40 cm. They are biennial plants which need to be grown freshly each year – however, this is not necessarily a fixed designation, and a bushy plant may become perennial, surviving over successive seasons. See more: [ Ссылка ]

Most wallflower garden cultivars (e.g. Erysimum 'Chelsea Jacket') are derived from E. cheiri (often placed in Cheiranthus), from southern Europe. They are often attacked by fungal and bacterial disease, so they are best grown as biennials and discarded after flowering. They are also susceptible to clubroot, a disease of Brassicaceae. Growth is best in dry soils with very good drainage, and they are often grown successfully in loose wall mortar, hence the vernacular name. Erysimum species are used as food plants by the larvae of some Lepidoptera (butterfly and moth) species including the Garden Carpet (Xanthorhoe fluctuata). In addition, some species of weevils, like Ceutorhynchus chlorophanus, live inside the fruits feeding on the developing seeds. Many species of beetles, bugs and grasshoppers eat on the leaves and stalks. Some mammalian herbivores, for example Mule Deer (Odocoileus hemionus) in North America, Argali (Ovis ammon) in Mongolia, Red Deer (Cervus elaphus) in Central Europe, or Spanish Ibex (Capra pyrenaica) in the Iberian Peninsula, feed on wallflower flowering and fruiting stalks. Most wallflowers are pollinator-generalists, their flowers being visited by many different species of bees, bee flies, hoverflies, butterflies, beetles, and ants. However, there are some specialist species. For example, Teide wallflower is pollinated almost exclusively by Anthophora alluadii. See more: [ Ссылка ]

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