Related Clues:

• Gardener's purchase
• Tulip planting
• Thermometer part
• Flower starter
• Iris's base
• Light source
• Onion, for one
• Future tulip
• Good idea, symbolically
• Cartoonist's idea?
• Socket insert
• Garlic unit
• It's often screwed up
• Daffodil source
• Source of illumination