User blog comment:Zombotanist/PvZH Card Expansion Ideas/@comment-29877873-20170921222021/@comment-25982947-20170922045249

That would defeat the purpose of the card, the idea is to give an alternative to Plant Food for the same cost. PF can be used before Zombie tricks and that's the best part about it, but Power Lily can be used over and over again if you can keep both it and the plant in the same lane alive. It's also weak to Hearty which is the weakest class against Mega-Grow in general so it's an interesting trade-off.

Also Bonus Attacks are strictly a Mega-Grow thing so I don't see any connection to Smarty at all.