Last night there was a pretty heavy frost... we hadn't seen frost for a good long while. They say after May 15 you can expect to have frost free nights.
Problem with such a frost is if you've seeded and they've just popped... you could lose all the young ones. Start over. That's the problem in Scandinavia. They have harsh winters, can lose a good portion of their greens, and then have to fight through the spring and the frosts that can cause problems with areas that have been overseeded.
This reagion of Poland doesn't have such problems. Their courses are in better condition in March than most Scandinavian courses in late June.
Tony Ristola
agolfarchitect.com
+1 (909) 581 0080