Poison ivy berries are acquired through the Farming skill by picking from a player-grown Poison ivy bush. The item is an ingredient in Weapon poison (++), and can be used with a Compost Bin to make supercompost.
After harvesting the berries, a player will easily recover the cost of the seed, while making a fair profit. In addition, the poison ivy bush will never become diseased, so using compost or supercompost is unnecessary. These grow in 2 hours and 40 minutes, yielding 674 experience points from checking the health, and 45 experience points per berry picked making them quite efficient for training Farming past level 70. There is generally a high demand for these berries, usually from high-levelled players training Herblore.
Further picking the berries will not require a specific Farming level. Once all berries are picked from the bush, it will produce more berries, approximately 1 per 20 minutes. One seed can produce a minimum of 4 berries, where the Farming level reduces the chance of using up one of the three "lives" of the patch, much like harvesting herb patches.
Farmers require eight poison ivy berries to watch over your growing Calquat tree.
Berry patch locations
You can grow Poison ivy berries in the following locations: