Gymnocalycium baldianum, the spider-cactus or dwarf chin cactus, is a species of flowering plant in the cactus family Cactaceae, native to the Catamarca Province in Argentina. There are many hybrids with a wide range of flower colours.
Gymnocalycium baldianum grows at elevations of 500 to 2000 metres above sea level. This high-altitude plant is often found among grass. Gymnocalycium baldianum has a relatively restricted range, has a continuous distribution and is not fragmented. Collection is a major threat for the species in parts of it range also fire affects it in some areas. The synonym name Gymnocalycium venturianum is very common in collections, and even at cactus nurseries. It is a very variable species in its general appearance. Gymnocalycium baldianum is very easy to grow, these plants offer no cultivation difficulties.
In the growing season, the plants should be watered at least once a week. When watering, the soil should be given a good soaking, allowing excess water to drain away. Allow the compost to dry out slightly between each watering.
The ideal blend of soil for plant growth is called loam. Often referred to as topsoil or black dirt by landscape companies, loam is a mixture of sand, clay, and silt.
Cacti fertilizer requirements are pretty simple. Any good houseplant food (diluted to half) that's higher in phosphorus than nitrogen is a good choice. A 5-10-5 solution can work well.
Never remove more than a third of the foliage in any one year and to cut just above a node on the stem.
Many seasoned gardeners recommend using a container that is about 10% larger in diameter than the cactus plant at its widest point.
