Aerial roots were orchids' ingenious response when the dense canopy of rainforest denied them access to light millions of years ago. The exotic flowers cling to the branches with their aerial roots and catch the nutrient-rich rain. It is obvious that these lifelines should not be cut if possible. We will be happy to tell you when and how you can still cut off orchid roots.

Only diseased and dried up aerial roots may be cut off

Distinguish diseased from healthy roots - this is how it works

Given their vital functions, it is obvious that healthy orchid roots should not be severed. An exception applies if the root strands are diseased, rotten or dead. Diagnosing this condition with certainty is not always easy. On their surface, aerial roots have an absorptive tissue of air-filled tissue cells that appear white or off-white when dry, yet are fully functional.

As long as an orchid root is lush and green, there is no doubt about its health. However, if you notice silvery-white, dry roots, a moisture test will provide information about the actual condition. Spray these aerial roots with lime-free water. If they don't turn green within a few minutes, you can cut off the roots. You can immediately cut off all orchid roots that are mushy, rotten-brown or have black spots.

Instructions for root pruning on epiphytic orchids

If you have found diseased or rotten roots on an orchid, immediate action is required to prevent the pathogens from spreading further. If the strands have dried out due to a lack of water, wait until the next repotting date to cut them back. Prepare a freshly sharpened knife, scalpel or scissors and a disinfectant. How to do it right:

  • Unpot the orchid and shake off the substrate
  • Fix the affected aerial root with one hand, take the cutting tool in the other hand
  • On roots with black spots, cut off the diseased tissue in stages from the tip
  • Disinfect the blade meticulously between each individual cut to avoid transferring bacteria to healthy tissue

The pruning is finished when only juicy green tissue is left on all aerial roots. Ideally, you should now use a new culture pot to plant the orchid in fresh substrate. If you want to use the previous container, it will be thoroughly cleaned and disinfected.

tips

If numerous aerial roots protrude beyond the edge of the pot, the cramped orchid wants a larger culture pot. Please choose a date after the flowering period to repot the orchid. Soaked in soft, lukewarm water for a few minutes will make even the most unruly root strands nice and pliable.

Category:

Indoor plants