Answer: You are in zone 9 or 10 (not 11); these zones refer to the ability of a plant to withstand either the cold of winter or the heat of summer. Since you are in zone 9/10 you will have to dig up your bulbs after they have died back and give them a coldperiod (your refrigerator will do) or they will not grow and flower again. They need the cold! Be sure not to put them in the back of your frigde where things have a tendency to freeze. In your climate, tulips should be refrigerated at 40-45 degrees F until late November or December, then planted 6-8 inches deep so the bulbs can be as cool as possible.
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