Hi guys

just got some Holy basil plants (Tulsie)
Do we know if they are perennial ?
can I stick them in my forest garden and they'll be OK.
It also seem they have just flowered so will they kick the bucket after?

Cheers
Sebastian

Tulsie needs to be tipped to keep it from going to seed, which is the signal for the plant to die back.
Basil is not perennial but it does reseed itself, just let the flowered plant(s) make their seed and drop them (or gather the seeds if you want to spread more around the garden).
Since those you have are in flower, go ahead and pluck and use the leaves, but the plant is headed towards the end of its life now.

I think two out of the three varieties of tulsi sold at Strictly Medicinal Seeds tulsi rama and tulsi krishna  are perinnials when grown in zones 10 and 12.

I'm growing a temperate tulsi this year that is an annual but I'll save seed and expect to have it reseed some if I let a few go.  

There are small pollinators that love the blooms  as do I for tea.  I cut leaf and flowers when the flowers are just open for fresh leaf tulsi tea.

Was your plant labeled for variety?