Answer: Most spring flowering bulbs require a winter chill, which your gardening region cannot provide. So here's the best plan for your southern California garden: it is too warm to plant your bulbs in early fall. You can purchase freesia, allium, ranunculus, crocus, tulips, hyacinths and daffodil in September, but plan to store them in a dry, dark place until November. Tulips and hyacinths need four to six weeks of chill in the vegetable bin of your refrigerator before they are planted. So refrigerate them now and plant them in December. Be careful not to store bulbs in the same drawer with ripening fruit. Gases from fruit can cause bulbs to sprout.
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