This might look like a pot of addiction, but these tobacco plants are purely ornamental so please don't chew or smoke the leaves.
The chocolate Cosmos flowers are also sadly inedible, but you could make Absinthe with the Fennel or some tea once it's gone to seed, to aid your digestion and respiration/bronchial spasms if you have overindulged with REAL chocolates and cigarettes.
I did however select them based on their fragrance and long-flowering/season of interest, rather than for their addictive properties.
The Tobacco flowers are especially fragrant at night, so the pot would be perfect on a terrace or beside a door that you are likely to use or pass in the evening.
The Bronze Fennel leaves smell of Aniseed when crushed or picked and are especially good with fish so the pot could be positioned next to the barbecue or kitchen door.
Although the Cosmos flowers look like Chocolate they smell of Vanilla. They make very good cut flowers and the more you cut the more they will flower.
Most importantly they are all bee and butterfly friendly.
Although from different continents all three plants will enjoy full sun and free draining soil. As with all plants in containers, they will be relying on you to give them more water than they would normally require if they were planted directly in the soil.
Bronze fennel self-seeds readily, as do the tobacco plants when grown in sheltered London gardens, but the Chocolate Cosmos extinct in the wild in its native Mexico and being infertile and can only be propagated by vegetative cuttings- it is best treated like a dahlia (they both have frost tender tubers that can be divided during winter) so ideally you should put the pot into a frost free greenhouse or conservatory to over winter.
This pot will flower all summer until the first frosts and hopefully for many years to come.
Foeniculum vulgare 'Purpureum' (Mediterranean )
Cosmos atrosanguineum (Mexico)
Nicotiana affinis (brazil)