grow on papaya trees
, and they're used in Summoning, Hunter and Farming. Once a papaya tree has grown fully, it can be harvested repeatedly, with a papaya growing back every 45 minutes for a maximum of six.
Start out by taking the lodestone to Catherby and running south-east to the tree patch. Harvest the papayas and note them with the tool leprechaun. Do the same thing in Brimhaven by running to the Catherby docks, charting a ship to Brimhaven for 480 coins (240 if you've completed Cabin Fever), or with a brimhaven tablet. Then, teleport to South Feldip Hills using a ring of duelling, use the spirit tree to get to the Tree Gnome Stronghold, and harvest the papayas on that tree. Use that same spirit tree to get to the Tree Gnome Village, exit the maze by following Elkoy, and harvest that patch. Then use the witchdoctor mask or juju teleport spiritbag to teleport to Herblore Habitat and take the papayas from that tree. Teleport to Lletya with the crystal teleport seed, harvest that tree. Finally teleport to Prifddinas, either with crystal teleport seed and selecting Meilyr or via lodestone and running to Meilyr, pick the tree and bank.
Maps of all of the fruit tree patches can be found here.
If possible, you should use a giant ent familiar, which has a 50% chance of doubling the yield of papayas, giving you an average of 9 papayas per patch instead of 6. That makes this method work well with other harvesting money makers, like picking cactus spines.
As this uses the same patches as palm trees, it cannot be used at the same time as the picking coconuts
method. Whichever one is more profitable should be used.