Stem Fruit Growth

Rules

Stem stages	0 to 7. Only a stage 7 stem grows fruit.
Light needed	Light level 9 or higher, for stem growth and for fruit.
Growth timing	Stems grow on random ticks: at random moments, on average once every 68.27 seconds per block at the default random tick speed of 3.
Growth chance	Each random tick uses the same Farmland points and chance as crops, 1 in 3 at best. This applies to every stem stage and to every fruit try.
Fruit side	For each fruit try the stem picks 1 of its 4 sides at random. If that side is not suitable the try fails; the other sides are not checked.
Fruit space	The chosen spot must be air and must have a fruit ground block under it.
Fruit ground	The same for Melon and Pumpkin: Coarse Dirt, Dirt, Farmland, Grass Block, Moss Block, Mud, Muddy Mangrove Roots, Mycelium, Pale Moss Block, Podzol, Rooted Dirt.
Stem ground	Melon Stems and Pumpkin Stems grow only on Farmland.
After the fruit	The stem attaches to the fruit and grows no second one. When the fruit is removed, it becomes a stage 7 stem again.
Bone Meal	Adds 2 to 5 stages. A stem that reaches stage 7 this way gets one immediate fruit try; the fruit is not guaranteed.