How long does it give somebody a lift for onion bulbs to fully grow. i entail it for a project.? ...

Root Barriers - set above or bellow title?
Answers:    Depends on where you live and how you start them.

Here's one source to try, for zone 5

http://www.urbanext.uiuc.edu/veggies/oni...
How strong do basil plants smell?
I plant the sets or plants around April 20, and acquire August 20. There are some varieties that grow solid big, and these would be your best bet if you want an onion fast. (Ailsa)