These suckers -- which are defined in my "California Master Gardener Handbook" as rapidly growing, upright secondary vegetative shoots that develop from the root, crown or stem of a plant -- occurred when the trees' fruiting (grafted) stock was pruned off or died, and the rooting stock took over. It's not good.
This is my old granny yellow grapefruit. The poor thing has been underwatered for years and needs a ton of pruning. Fruit is OK.
Sucker #2. Long, leafy shoots. Again, no sign of fruit or flowers. Just lots of shoot.
Ahhh, this is nice to see. My second grapefruit -- don't yet know if it will be yellow or red flesh. But please note the thick trunk, evidence of fruit and outward (not just upward) growth.
Now that I have identified the suckers, they are on the pull-out list.
They will never grow fruit!
I need contributors, not suckers! I'm thinking an orange, a lemon and a lime, for starters. Any suggestions for good desert varieties?