A nearby gardener will watch over your growing palm tree at the cost of 15 papaya fruits. Planting a palm sapling in a fruit tree patch gives 110.5 Farming experience, checking the health of a palm tree gives 10150.1 Farming experience, and harvesting the six coconuts gives 249 Farming experience total. This comes out to 10509.6 total experience per seed, unless the tree dies, in which case only the 110.5 experience for planting is gained.