1-3 years after it sprouts incredibly
plant a grapefruit seed. Water it. Let it grow into a tree in a warm climate
They grow on trees, just like oranges and lemons.
because grapefruits are actually hibrids from an orange tree so the orange could also get polinated from a grapefruit tree
No.
yes
Fungi spores use it as soil and it grows on the grapefruit.
Because grapefruit grow in bunches like grapes do.
grow off vines and underground
yes
warm
I was going to reply no, but with further research, I will go out on a limb and say, maybe. I suggest buying a dwarf grapefruit tree and keeping it in a container, so it can be brought inside during the winter. It might also survive in an atrium. Interestingly, a citrus needs a chill period in the winter to produce good fruit. However, the bitter winters in your area will kill an unprotected citrus tree.
Yes it is.