You must first buy the seventh ($), eighth ($), and ninth ($20,) seed slots. One extra seed slot can be obtained in Pirate Seas, in a gate between Day 9 and Day 10 before the update or by completing Day 21 after the update. For Plants vs. Zombies on the iOS (iPhone/iPad), a GameFAQs message board topic titled "How do you unlock the slot?". Dentro do jogo, basta apertar para girar a slot machine (custa 50 “sóis” por girada) e cruzar os dedos! Repita quantas vezes for necessário. seed slots plants vs zombies. All together, it costs $, to get all 10 seed slots. Earn seeds, money and sun with the slot machine! Can you earn enough sun before the zombies eat your brains?Description of Slot Machine in Crazy Dave's. The. . . As per the Plants vs zombies wiki: Extra Seed Slot ten - $80, (unavailable on iOS, Mobiles with Samsung bada OS, DS, and Android because.