Hi Andrew, Our three year old bulbs have returned each spring, blooming right now. Our soil is heavy clay with tree trimmings mulch. They might be getting a little summer water from a dripper nearby. Full sun next to a stone patio that radiates heat. We had little rainfall this winter - about 6" total, less than half of normal. All this info is anecdotal since we don't grow lots of them. Hope it helps. Cheers, Bracey San Jose -----Original Message----- From: pbs-bounces@lists.ibiblio.org [mailto:pbs-bounces@lists.ibiblio.org] On Behalf Of AW Sent: Monday, April 14, 2014 10:25 AM To: pbs@lists.ibiblio.org Subject: [pbs] Resprouting Ornithogalum Here's what should be a trivial question - how do you get the commercial Ornithogalums to bloom a second year, or even to get them to quit dormancy? Several of my friends have found similar difficulties. Thanks Andrew San Diego