Rapid Growth is a Seren spell unlocked by The Light Within. It is a skilling spell, that enables a growth stage to be skipped for trees, fruit trees, and herbs. This spell cannot be cast on a diseased patch. It can only be cast once per day per patch, resetting at 00:00 UTC. This can be increased to 2 by wearing the Tree farmer outfit or Master farmer outfit.
The following patches allow the spell to be cast:
- Tree patches for regular trees from oak tree up to and including magic tree
- All fruit tree patches except for the calquat tree patch
- All herb patches (not including vine herbs)