Hi, Twinkletoes. I live just 6 miles from Ayr, and 7 from the coast. Moved here 7 yrs ago from Lancashire. I have found that I can grow everything that I could down there.
This yr we have often had days that were sunny when everyone else had rain and cold! Yes, our summers can be a wee bit shorter, but we have sun in the evenings for around an hour or more longer, so I get to stay out playing in the garden till around 11pm at the height of summer, which makes up for it somewhat! I have had some of the best tans of my life as early as March some yrs, but have learned never to let that fool me into putting plants out too early, as we do get some late frosts. Funnily, it was visiting my grandfather in Hereford as a child that gave me my interest in gardening!
As always, a lot will depend on your soil and the aspect of your garden. I can grow some quite tender plants, as long as I plant away from the deep winter shade at the back of the house, as my soil is very stony, so well-drained. In summer, my prob is growing shade loving plants, as we have very little then.
As to your herbs, most will grow well here away from frost pockets, as long as they are well established before winter. I did lose rosemary and sage this yr, but they were planted too close to the house, and we had a much colder and wetter winter than previously. They had survived a very snowy winter 2 yrs ago. I had fed surrounding plants quite a lot, and I think thier growth was too soft for the winter.
One other problem can be the wind, again depending on the garden itself.
However, those are all the bad points! There are many good points to living in Ayrshire, and I would never move back to England unless forced. The people are very friendly, we have lots of gorgeous countryside, our choice of sandy or rocky beaches not far away, beautiful gardens to visit, woods and forests, and still some small pockets of red squirrels (for now, anyway, unless the greys take over completely) The northern lights can also be seenquite well from some parts of Ayrshire, so I am told, although I have not seen them yet.
I seem to remember Hereford being a beautiful part of the country, very similar to a lot of Ayrshire, so what is bringing you here, if you don't mind me asking?