Board Thread:Challenge of the Day/@comment-25337988-20140915050447/@comment-24057583-20150106211147

Beat Pirate Seas - Day 22 using only plants that cost 200 sun or more (Repeater, Threepeater, Winter Melon, Laser Bean, Bowling Bulb, etc.) without letting a single Imp Cannon explode. Spikerock is the only plant over 200 sun not allowed. No Power-Ups, Boosts, or Plant Food is allowed (except for the two that you start off with). You may also not lose a single lawn mower.

Spikerock makes this challenge too easy, so its use has been banned.