Every 2 hours you are able to claim a free basic seed bag. Opening the bag will give you 6 random seeds. You can then drag seeds into each of the 5 grow spots in the garden tab.
"The planted seeds take 2 hours to grow into flowers. Harvesting flowers gives event points depending on the rarity of the seed planted. The Event points unlock personalised rewards.
You can watch videos to shorten the timers on the free seed pack or garden by 30 minutes, but this can only be done once per action every 1.5 hours.
The final reward at the end will be one of the following: a decoration previously sold as a shop pack in an event, or flutterbucks!"