the Amarcrinum, once called Crinodonna, is a hybrid between the Amaryllis belladonna and the Crinum; the bulb is large, and can easily reach 20-25 cm in diameter. It is a bulb with a late spring bloom, which lasts throughout the summer, and sometimes even in autumn; it produces thin lanceolate, ribbon-like leaves, up to 40-60 cm long, between the leaves in spring a thin, rigid, bare, tall stem is raised, around 60-80 cm, at whose apex 5-8 trumpet-shaped flowers bloom, delicately scented , of a pink color. There are some cultivars of amarcrinum, but in general the flowers are of delicate colors.
Amarcrinum plants are planted in a sunny, or slightly shady, place; they fear frosts, especially if intense and prolonged, which is why they are generally grown in open ground all year round only in areas with a mild climate. They can also be cultivated in pots, or with the arrival of winter colds, the bulbs are unearthed and stored in a dry and not too cold place until the end of winter.
The Crinodonna specimens need to receive some hours of sunlight during the day to be able to develop at their best and to ensure that their flowering is abundant; this plant does not like the high temperatures of the summer season and should not, therefore, be grown in full sun.
Amarcrinum plants can easily withstand short periods of drought, but for better vegetative growth it is advisable to water regularly from March to October, but only when the soil is well dry. During the vegetative period, provide fertilizer for flowering plants every 15-20 days, mixed with the water used for watering.
Check that the soil allows good water drainage to avoid the formation of dangerous water stagnation that can lead to the bulb's rotting.
The specimens of this genus prefer soft and deep soils, very well drained, rich and fertile; you can use a balanced universal soil, mixed with a small amount of sand. They are placed at a depth of about 20-22 cm. They can resist even in dry soils for a certain period of time, but they are very afraid of the formation of stagnant water that can quickly cause bulb rotting.
If grown in pots, it is advisable to use a rather large container, given the size of the bulb and the fact that it should be buried in depth.
The reproduction of these plants occurs by division of the bulbils, which are produced each year on the sides of the main bulb. These should be placed in a well-balanced and draining soil, rich in nutrients so that new specimens are fostered and developed.
Crinodonna - Amarcrinum: Pests and diseases
An excessive watering can favor the development of the rot of the bulbs. Even an excessive presence of moisture can cause the onset of fungal diseases in Crinodonna. Sometimes the Crinodonna plants can be attacked by scale insects and aphids. On the market there are special products that allow you to treat the problem promptly. It is also possible to use natural preparations based on garlic, boiled in water, to be sprayed on the affected plants.