Posted: 03/07/2013 at 10:41
thyme - This stuff is pretty hardy given good drainage and enough sun. Should be ok to grow from seed.
oregano - not tried growing this, but believe it is a medditeranean herb so should like same conditions as the thyme.
sage - this one is pretty hardy (always a good thing in this country). As the weather is set to improve, worth maybe giving a shot from seed.
mint - would never grow this unless in a pot or within an 'In the ground' container as this stuff spreads!
basil - Not sure if it is worth growing this from seed in a herb garden. Maybe grow this in a pot on a windowsill, keep it small and bushy, then plant out after frosts next year (but keep the roots wet in well-drained soil, whilst giving it enough sun!)
coriander - This should grow quite quickly.
chives - Should be ok to grow too.
radish (French breakfast) - These grow really fast, but not sure id put them in a herb garden.
Scotch Bonnet chillies - This late on, I would maybe treat this similar to the basil by growing in a pot and keeping it happy this year, then planting it out next year.
I think if it was this late into the year, as you can buy most herbs so cheap, might be more productive to buy them already grown (should be able to get them for 80p - £2 a pot) and plant them out. The chilli is probably also better buying already part-way grown (places like South Devon Chilli Farm are selling plug plants at the moment), especially if you want a crop this year, as chilli's are notoriously hard to look after over the winter months, and usually grown as Annuals if outdoors.
Hope the above is of some assistance!