This is probably one of the weirder questions you will get. It's for a novel I am writing. I want the seeds of the Capparis tomentosa (in this particular case, not spinosa, but they're probably the same) to have been planted, grown to a stage of maturity where it will produce flowers and wind will carry its pollen to a wild turnip and create a hybrid. I need to know how long that would take in years.
The best I can do for you is inform you that that Turnips will cross pollinate with Wild Turnips.