oh what I would give for just a day of rain!
Novice answer--
Too much wet is always a problem and it is really a question about drainage ...if the area is well drained and moist but not soggy with day after day of spring rains then it would probably be just fine--especially if the plants are actively growing and not dormant, which presumably they are, right?
Torrential rains, on the other hand, can wash away new plantings, so if you are having that kind of rain, it may be best to wait rather than risk trying to find your babies in the washout and putting everything back together (been there-done that).
Funny thing I've learned:
I was so freaked out about the whole winter-wet thing and wrongly assumed that some plants which will croak if wet in winter could tolerate summer dryness in their sand and gravel beds--hahahaha--I've created some very well drained areas that can withstand whatever winter and spring moisture comes our way only to fry my precious babies to death by August
too much dry is a problem too
