California lilac plants are a variety that is easy to grow, both in pots and in the ground.
These rustic shrubs, which reach a height of about 2 metres, prefer luminous positions, even when exposed for a few hours to direct sunlight; they are not afraid of the cold winter temperatures, but we suggest planting the ceanothus in a place protected from cold winds also because their root system is rather small and could be damaged by the wind.
They are rustic and resistant plants which can bear well also the temperature changes, but in case of very cold climate it is better to place them in a more sheltered corner.
- The genus Ceanothus comprises about fifty species of shrubs originating in North and Central America; the genus is quite varied, and the shrubs are of very different sizes depending on the type of shrub…
- The species belonging to the genus Ceanothus are commonly called California lilacs. In general, irrigations should be regular and frequent, especially during the first year of age….
California lilac has a rustic structure that makes it rather resistant.
From March to October, during the vegetative and flowering period, it is advisable to water abundantly, almost always keeping the soil moist, but checking that there is no stagnation of water, harmful to the plant.
In winter, reduce watering, but do not suspend it completely, always checking that there is not an excessive presence of water that could lead to the onset of root rot dangerous and harmful.
At the end of the winter it would be advisable to provide the soil in which it is located with the lilac of the mature manure.
Every 15-20 days provide fertiliser for flowering plants in the vegetative period.
California lilac plants prefer loose, well-drained soils, rich in organic matter.
It is advisable to prepare an ideal compound by mixing balanced soil with a small amount of sand and perlite to increase drainage.
They grow with more difficulty in soils rich in limestone, but manage to have a good adaptation. When the soil type is not right, they may present problems of iron chlorosis, which leads to yellowing of the leaves. In this case, it is possible to intervene by providing iron supplements.
The multiplication of these plants takes place by semi-woody cutting and is practiced in summer; to practice numerous cuttings, because the rooting is not always easy.
The new plants must be grown for a couple of years in pots before they can be planted.
The ceanothus can also be sown, but the daughter plants do not always have flowers equal to those of the mother plants, moreover the germination is not easy; in nature, the seeds of ceanothus germinate more easily after a fire.
California Lilac – Ceanothus: Pests and diseases
Being a type of rustic plant, California lilac is unlikely to be affected by pests and diseases, but, especially when grown in calcareous soils, it is particularly afraid of iron chlorosis, which can be easily avoided by occasionally providing iron-based fertilizers.