April in South Moline arrives all at once, one warm week turning the town from gray to green between Monday and Friday. SPRUNG'S PROFESSIONAL LAWN SERVICE meets it with the first cuts of the year and then keeps the rhythm going, mowing, trimming, edging and cleaning up straight through to the last pass of fall. That first run across a winter-flattened yard is the most satisfying one there is; everything after it is upkeep, and upkeep is where lawns are actually made. The bluff wind still carries an edge in early spring, which is exactly when the work is nicest to be doing. From that first week onward, the yard stays ahead of itself.