When caring for cacti, the focus is rarely on the roots. If, on the other hand, the change to a new pot is on the agenda, cactus gardeners ask themselves whether too long root strands or a dense root network should be cut. Read the answer here with tips on how to do it correctly.
Cactus roots should not be pruned
Cutting is allowed - it is not advisable
Roots are the lifelines of all plants. Cacti are no exception in this regard. The root system usually consists of shallow or deep main roots, which are equipped with a dense network of fine and hairy roots. This is how water and nutrients get into the pathways where they are processed.
Hairy roots on cacti usually only live for a few hours or days. The lifespan of fine roots is also very limited. Numerous types of cacti shed their delicate roots in the drought and grow them again if necessary. Intervening in this cycle with scissors requires careful consideration and should only be done in an emergency.
Cutting cactus roots - you should pay attention to this
If you notice dead roots when repotting, this is one of the rare cases for a pruning. In order to keep the stress on the cactus low, the following procedure has proven itself in practice:
- Freshly grind and disinfect cutting tools
- Cut off dead roots down to the healthy tissue
- Dust cuts with charcoal powder
- Leave to dry in a shady spot for 3 to 4 days
After you have potted the cactus, it should recover from the hardship in the partially shaded, warm location. Water the plants for the first time after 2 to 3 weeks.
Beet roots or flat main roots should be spared from a cut. Small species such as Yavia cryptocarpa or Blossfeldia liliputana survive this procedure just as little as Astrophytum up to 150 cm in size.
tips
Proper pruning provides valuable help so that cuttings take root. Cut off straight, the strong outer skin contracts and reduces the potential sprouting surface in the juicy, fleshy inner tissue. By tapering a cutting at the base, you create a cylinder from which the tender roots can sprout in abundance.