Cactus spines are harvested from a grown cactus in the cactus patch in Al Kharid and grants 25 Farming experience for each spine. Cacti require level 55 Farming to grow. They are used, along with red spider's eggs, to make weapon poison+. Six Cadava berries are required to protect it from disease.
One cactus can produce a minimum of 3 spines, where the Farming level reduces the chance of using up one of the three "lives" of the cactus patch, much like harvesting herb patches. The chance is 75% at level 55, linearly decreasing to 30% at level 99. On average, the player can expect around 10 spines at 99 Farming. Compost, Farming cape and Magic secateurs do not currently have an effect on the yield.
Alternate ways to obtain cactus spines include looting nature impling jars which can be obtained through the Hunter skill, or by killing the Kalphite Queen or Scorpia, both of which may drop 10 noted cactus spines.
Monster Combat level Quantity Rarity Nature impling N/A 1 Scorpia 225 10 Kalphite Queen 333 10
- Prior to an update on 12 July 2018, cacti would always give three spines from a full yield, regardless of the player's Farming level.