Possible Clues:

• Miracle- -- (garden-care brand)
• Miracle-___ (Scotts brand)
• Miracle- -- (name in garden care)
• Suffix with Nu- and Agri- in garden product names
• Miracle- -- (plant food)
• Nursery product word
• Syllable in some lawn product names
• Miracle-___ (gardener's buy)
• Cultivation, in product names
• Miracle-___ Garden Feeder