Grose

Grose is a plant that,as title suggests,grows. After you plant it,at first,it will be just a spiked vine. It will hurt zombies,like a Spikeweed,but it can get eaten,having 10 NDS. But after 30 seconds,a bulb will grow at the end,making it shoot weak Pollen at zombies that does 0.5 NDS. After 30 seconds,it will grow into a larger bulb,that will sometimes (rarely!) shoot a poisonous pollen instead,that will apply 0.5 NDS/second damage to the zombie. Then,after another 30 seconds,it will blossom,and transform to a rose that throws petals to zombies. Petals do 3.5 NDS damage.

Besides it does pretty big damage at the end,it takes time to grow,so this kinda balances it.