Cedrus atlantica is a species of cedar native to the Atlas Mountains of Morocco, to the Rif Mountains of Morocco and Algeria. It is a large evergreen coniferous tree growing to 4050 m tall and with a trunk diameter of 1.52.5 m. The leaves are needle-like, in clusters of three, 512 cm long and 2 mm broad. The cones are oblong, 59 cm long, 23 cm broad, blue-black with a thin, fragile, woody shell. The male cones are shed soon after shedding their pollen in late spring. The female cones persist and ripen in late autumn, with the seeds dispersing in early winter.
Related plant:
Cedrus Deodara
Related plant:
Cedrus Libani
About soil condition, Cedrus atlantica prefers deep, fertile, well-drained soils, but it is drought tolerant. It does not tolerate waterlogging. It has a moderately fast growth rate and can reach a height of 30 to 40 m (98 to 131 ft) and a diameter of 1 m (3 ft) in 20 to 30 years.
Just like other members of the Cedrus genus, the Cedrus atlantica tree thrives in full sun. It is a hardy tree that can tolerate long periods of drought, but it will not produce as much fruit if it does not have enough water. This tree requires well-drained soil and does not like to be waterlogged. It is a fast-growing tree, but it can be susceptible to wind damage.
The temperature condition that is best for the growth of cedrus atlantica is between 20 and 25 degrees Celsius. This temperature range is optimal for the growth of the plant, as it is not too hot or too cold. If the temperature gets too hot or too cold, the plant will not be able to grow properly.
Ideal humidity condition for this plant is around 50% - 60%. They cannot tolerate long periods of dryness and will start to drop their needles if the air becomes too dry. These plants prefer a moderate to high humidity level and will do best if placed in a room with a humidifier.
Regarding fertilizer, usually the plant does not need much additional nutrients if the soil is healthy. Once every two or three months, a light fertilizer can be applied if desired. When it comes to the roots, it is important to keep them moist but not wet. The plant does not like to have its roots sitting in water.
Pruning is an important part of keeping your cedrus atlantica healthy and looking its best. This evergreen tree can grow to be quite large, so regular pruning is necessary to maintain its shape and size. You can prune your cedrus atlantica any time of year, but late winter or early spring is ideal. Just be sure to use sharp, clean pruning shears to avoid damaging the tree.
Propagation of cedar atlantica is best done by rooting softwood cuttings taken from the plant in late spring. The cuttings should be taken from the tips of the shoots and should be about 6 inches long. Cuttings should be made just below a node, and the bottom leaves should be removed. Cuttings should be rooted in a mix of perlite and sand. Rooting hormone can be used to encourage rooting. Cuttings should be kept moist and in a humid environment until they have rooted.
Usually, the plant growth rate studies have been done in North America, where the species is native. In one study, cedrus atlantica was found to have a mean annual growth rate of 1.24 m (4.1 ft). In another study, the mean annual growth rate was found to be 1.37 m (4.5 ft). These studies suggest that cedrus atlantica has a relatively fast growth rate.
Common problems for this kind of plant are pests, diseases, and under watering. For pests, aphids and scale insects can be a problem. For diseases, canker and root rot can be an issue. Under watering can cause the needles to turn brown and drop off.
Source:
Cedrus atlantica | Tropical Restoration Library
Cedrus atlantica - UDBG
Cedrus atlantica | Trees of Stanford & Environs