Hello,
.
What do you want to do?
Study or go with job?
.
If study,
Then you can go for MSC in,
Biotechnology
Microbiology
Plant genetics
Human genetics
.
If not you can go for entrance exams like,
CAT
XAT
SNAP
MAT
.
If you wanted to go for job then you can,
Open Private nursery farms
Be a nursery manager
Be a greenhouse manager
Can start a farming consultant
Can be a Botanical assistant
Can join a BSI
.
These all you can do.Hope this was cleared.
Best of luck
Thank you

After completing B.Sc Botany, you can do M.sc in Cell Biology, Biotechnology, environmental science, forestry etc. After completing M.Sc, you can work as a teacher in schools, or you can write UGC NET.
You can go for integrated M.Sc+PhD. Otherwise if you want to switch to management side, you can do MBA.
It totally depends on your interest what course you want to choose. Whichever course you choose, be best in that.
Through competitive exams you can qualify for respected jobs such as Bank PO, special officer in Bank, SSC, Indian civil services, state civil service, UPSC etc. If you are really interested in these services then you have to start preparing from today.