Hi Rob,
I have been there in spring, end april-beginning may, two years ago. The coastal pathways are very nice indeed. Landscape-wise and many plants. But if you walk away from the coast and move into the hills/mountains you will be flabbergasted! In the light forests grow many (!) orchids and other plants. I found it sort of paradise there. I think summer is not too good for wild plants there.
Greetings, Guus