Top 5
2) Winter Melon.
3) Gatling Pea (hate this plant but whatever.)
4) Gloom-shroom.
5) Melon-pult.
5) Pea Pod 4) Snow Pea.
3) Torchwood.
2) Repeater.
1) Peashooter.
You get the tenth seed slot on PC version by buying it forR$80,000. You must first buy the seventh ($750), eighth ($5000), and ninth ($20,000) seed slots. All together, it costsR$105,750 to get all 10 seed slots. It costs 80,000 in Crazy Dave's Shop.