Requirements:

Collect 20 Gardening Shovels
Collect 5 Potting Shed Bonuses
Craft 12 Bouquets of Roses
Rewards:

500XP, 500 coins, Spring Flowers Crop unlocked
Notes: Shovels are requested from neighbours, Bouquets are crafted using pink and white roses (tending rose crops of the same colour) and Longstem Red Roses (request)