Rooting Rain Tree (Samanea saman) Cuttings

Softwood Cutting Protocol for Tropical Legume Tree

Rain tree roots moderately well from semi-hardwood cuttings.

Take 6-inch cuttings from current season's growth, just below a node, with a "heel" of older wood.
Remove all but top 2–3 leaves; discard any flower buds.
Dip base in rooting hormone (Rootone or IBA powder).
Insert 2 inches deep in moist sterile sand or peat:perlite.
Seal pot in clear plastic bag; place on heat mat at 75°F (24°C).
Provide bright, indirect light.
Check after 8 weeks; may take several months.
Once rooted, pot up, harden off, then plant out after last frost.

Bottom heat and high humidity are critical for this tropical species.

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