Propagation Cutting & Cuttings & Mother Plants Needed

Propagation by cuttings is raising new plants vegetatively from a piece of stem (or sometimes leaf or root) taken from a parent plant. Many crops — grape, rose, hibiscus, cassava, sugarcane — are raised this way, so every new plant is genetically identical to the mother. This calculator works out how many cuttings to strike and how many mother plants you need to hit a target.

Not every cutting roots, so you strike more than your target. Cuttings needed = target plants ÷ rooting success, then add a buffer for handling losses. For example, to end up with 800 plants at 70% rooting you'd strike about 1,140 cuttings, plus a 10% buffer for roughly 1,250 cuttings.

Rooting success (or strike rate) is the share of cuttings that form roots and become viable plants. It varies with species, cutting type, season, hormone use and mist — hardwood cuttings of easy species can exceed 85%, while difficult species may be 30–50%. The lower the rooting %, the more cuttings you must strike to reach the same target.

Each mother (stock) plant supplies only a limited number of cuttings per round without being weakened — anywhere from a handful on a young rose to dozens on a vigorous grape or sugarcane stool. Divide the total cuttings you need by the cuttings per mother plant to find how many stock plants you must keep.

A buffer covers losses beyond rooting failure — cuttings damaged in handling, lost to disease or rot in the bed, or culled as weak. A 5–15% buffer on top of the rooting-adjusted number means you still hit your target even after these extra losses. Skip it and a bad batch can leave you short for planting.

Hardwood cuttings are taken from dormant, mature wood (grape, fig, currant) and are slow but tough; semi-hardwood from part-ripened summer growth; softwood from soft new spring growth, which roots fast but wilts easily and needs mist. The cutting type affects rooting success, so set the rooting % to match what you're taking.

Choose healthy, true-to-type, disease-free parents and manage them as dedicated stock plants — well fed, lightly pruned to push fresh shootable wood, and rogued of any off-types or virus. Good mother plants give more cuttings at higher rooting success, so a small well-kept block can supply a large propagation run.

Yes — sugarcane setts, cassava stem cuttings and similar cane crops follow the same maths: target plants ÷ establishment rate, plus buffer, divided by usable cuttings per cane. Just enter the establishment percentage as the rooting success and the number of setts each mother cane yields.

They're solid planning figures. Real rooting varies with weather, media, hormone, hygiene and skill, so re-check your strike rate from past batches and feed it back in. Treat the result as how many to strike to be safe — measuring your own rooting % over a season makes it far more accurate.