My practice, which seems to be effective, is to apply nutrients to early-growing bulbs lightly in fall (autumn) and more heavily during early to mid spring. However, this reflects the weather cycle where I live on the Pacific coast of North America, when cool, wet weather begins in October and continues, with only intermittent frosts, through winter and spring. Bob Nold is gardening in Denver, Colorado, which has an entirely different annual cycle. I remember the great grower Fritz Kummert saying that bulbs that grow following snowmelt can tolerate, and indeed may require, much moisture and nutrition during their growth spurt from late winter to early spring. Last spring I had the opportunity of seeing many snowmelt bulbs in the Caucasus and eastern Turkey, and the soils in which they were growing were often saturated, with many of the finest populations of bulbs near seasonal streams where one assumes mineral nutrients are especially available during runoff. Jane McGary Portland, Oregon, USA On 3/20/2016 8:54 AM, penstemon wrote: >> I use dolomitic limestone dust ( magnesium carbonate), but yes. > At what time would you feed them? My inclination would be to feed after the flowers fade. > Or does it make a difference? > Bob Nold > Denver, Colorado, USA > > > > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/ >