Cereus tarijensis AV7

Cereus tarijensis, is a cactus species native to Bolivia. Here's a detailed description and some cultivation tips:

Description

1. Stem: Columnar, growing upright and branching from the base. It can reach up to 2-3 meters in height. The stem is green, sometimes with a bluish tinge.
2. Ribs: Generally, it has about 15-20 ribs, which are low and rounded.
3. Areoles: The areoles, from where the spines emerge, are spaced evenly along the ribs.
4. Spines: The spines are yellowish or brownish, with usually one central spine and several radial spines surrounding it. They are quite robust and can be up to 5 cm long.
5. Flowers: The flowers bloom nocturnally, typical of many Trichocereus species. They are large, white, and very fragrant, often attracting nocturnal pollinators.
6. Fruit: The fruit is a small, greenish to reddish berry, containing black seeds.

Cultivation Tips

1. Light: Full sunlight is ideal. However, in very hot climates, partial afternoon shade can be beneficial.
2. Soil: Well-draining soil is essential. A cactus mix or a sandy loam soil is suitable.
3. Watering: Water thoroughly but infrequently. Allow the soil to dry out between waterings. Reduce watering in winter to prevent root rot.
4. Temperature: It prefers warm temperatures but can tolerate mild frost for short periods. In regions with harsh winters, it's best to grow it in a container that can be moved indoors.
5. Fertilizing: Use a balanced, water-soluble fertilizer during the growing season (spring and summer), diluted to half strength.
6. Propagation: It can be propagated easily from seeds or cuttings. Cuttings should be allowed to callous over before planting.
7. Pests/Diseases: Watch out for common cactus pests like mealybugs and scale insects. Overwatering can lead to root rot.

Remember, each cactus has its unique needs based on the environment, so these tips should be adjusted to suit the specific growing conditions.