you may be able to buy it online on this above site but wait for some months because it is too cold ,tulsi does not grow in winters As .soon as spring comes put the seeds into the mud in a pot to grow ,rest read my hub on how to grow tulsi and do as suggested . Hare Krishna!
Dear Lotuslove18 I checked out the site but Jamie Oliver does not seem to suppy Tulsi. I checked under the Latin name Ocimum sanctus as well, but no luck. May I ask if you have Tulsi plant , it seems you may have. Where did you manage to get seeds I am wondering. Thankyou anyway.
All glories to Srila Prabhupada ! Jaya Sri Krsna !