The new charmed planter thing is cool. But I feel at a disadvantage because I can't really tend to the thing every 30 minutes. I have a job. It's a no-no to use your phone while on the clock. Anyway the event started this morning, and I already see people who have handed out 200+ plants already. And I've only handed in 14 (as of this writing). Yet I've been trying as hard as I can. 

You can always buy plants from other users, if you have to. Those who've handed in hundreds of flowers that early either bought them, or were likely hoarding them from last year. Don't get discouraged! There's plenty of time to submit enough to get the rewards!