Best time for viewing wildflowers

I was in Greece March 22nd to April 7th, this year. Throughout the period the wild flowers went from newly emerged to fully emerged. The tour guide told us that in two weeks everything would be brown. However, from reading reviews of the later April tours it sounds as if they had beautiful flowers as well. Also, it is likely the flowers were fully out the entire trips. Depends on the particular year, I guess. I picked the tour I did due to the prior year's reviews. I was not disappointed.

We just returned from Greece. We started with Rhodes at the beginning of May, then went to Crete. Wild flowers were splendid in both places. Since they are more southerly than the Peloponnesus, I should think there will be wild flowers there in May.

It depends on whether you are looking down at sea-level or up in the mountains, where the wildflowers will be a little later. Also, whether you are in Northern or Southern Greece. Here in Crete, early - mid-April is usually the best time, although the weather is more unpredictable then. In April you will need warmer clothes, you'll want lightweight waterproof jacket in both months, just 'in case'. If it is a wildflower specialist holiday, the people organising should be able to find you flowers through to mid-May.

I was in Greece on the Rick Steve's tour the end of March beginning of April 2016 and saw plenty of wild flowers. At the end of the tour I was in Istanbul April 12th-15th. I saw the tulip display which was located between Hagia Sophia and the Blue Mosque. I do not know when the tulip festival begins.

Thank you all for your input! It looks like I can't wrong with most of April, so I think I'll shoot for the middle and hope for the best!