Gardeners have crocuses to herald the arrival of spring. You might just say that BSO audiences have Bernard Haitink.
The distinguished Dutch conductor has made a habit of appearing here in late April or early May, just in time to pull a veil of clean and cloudless musicality over the subscription season. He has done so again this year, returning on Thursday night to Symphony Hall with a particularly germane program pairing Schubert’s youthful Symphony No. 5 with Mahler’s heliotropic Symphony No. 4. The latter, in particular, received a wise and ravishing performance. It’s good to have Haitink back.