One possible solution is to store Ornithogalum dubium bulbs completely dry and unpotted in a paper bag on top of a refrigerator, but I would only do this after checking the temperature there first to see if its warm enough (above 22C, 72F) and not too warm (maybe above 30C, 86F, which I realize is much cooler than your typical day time summer day in inland California, but I'm talking about constant 24 hour day/night temperature). Heating mats would be another option. As I previously posted, http://www.jhortscib.org/Vol79/79_4/12.htm , this study suggests that the optimal Ornithogalum dubium bulb storage temperature for flowering is between 22C (72F) and 30C (86F) but it's hard to say without seeing the complete article and this study was very limited to only one, arguably short, storage duration of six weeks. Even at these temperatures, the percentage of bulbs that flowered was below 100%. Longer warm storage durations would likely increase bulb flowering percentages. At higher temperatures, 35C (95F), the number of florets per bulb decreased, so while the percentage of bulbs that flower may increase with increasing storage temperature over a given temperature range, the number of florets per inflorescence decreases. Similar results are often seen with other unrelated species requiring vernalization: over vernalization ensures 100% flowering but also results in fewer flowers per plant. The key is always to find that optimal temperature treatment that maximizes both flower number and flowering percentage. An earlier study, http://www.actahort.org/books/430/430_34.htm , generally agreed with the one above and recommends storing harvested bulbs at 25C (77F) in addition to keeping them at 17C (63F) for four weeks prior to planting for potted plant production, although it's unclear from the abstract how these particular temperatures were selected. Another source (Netherlands bulb industry?) recommends a "dormancy-breaking requirement" of seven weeks at 28°C (82F): http://prod.bulbsonline.org/ibc/binaries/… Nathan