Can you clone a clone?

How clone-of-a-clone propagation works

Cloning is asexual reproduction. When you take a cutting from a mother plant and root it, the resulting clone has the exact same genome as the mother. When you then take a cutting from that clone and root it again, the new cutting still has the same genome. There is no theoretical limit to how many times you can repeat this process — the genetic information itself doesn't degrade. Some legendary strains in cannabis culture (Sour Diesel, Bubba Kush, OG Kush) have been propagated this way for 30+ years and remain in active cultivation.

The real risk: pathogen accumulation

While the genetics don't degrade, mother plants and their successive clones can accumulate pathogens over time — especially Hop Latent Viroid (HLVd), Hop Latent Viroid (HpLVd), various viruses, and systemic infections that aren't visible in the plant. These pathogens replicate alongside the plant during growth and pass to every new cutting taken from an infected mother. A single infected clone introduced to your grow can compromise every subsequent clone you take from it, even if the original mother shows no symptoms. This is why professional nurseries periodically reset their stock through tissue culture — a process that regenerates clean plant material from a small tissue sample, eliminating accumulated pathogens.

What actual genetic drift looks like (and doesn't)

True genetic drift in asexual propagation requires DNA mutation — and DNA mutation rates in plants are extremely low. Visible changes that growers sometimes attribute to drift are usually environmental (different feeding, different light, different age of mother plant) or pathogen-related (hidden infection altering plant expression) rather than actual genetic mutation. The cuts circulating today as authentic OG Kush or Sour Diesel are believed to be genetically identical to the original cuts from decades ago.

Best practices for serial cloning

Three habits keep your clone line healthy across many generations: (1) Take cuttings from healthy, vigorously growing branches — never from sick or stressed plants. (2) Sterilize tools between cuts to prevent cross-contamination from one mother to another. (3) Periodically test mothers for HLVd via PCR if you've been running a single mother line for more than 6-12 months. If a mother tests positive, replace her with fresh tissue-cultured stock rather than continuing to take cuttings from her.