Plant Food boost



The Plant Food Boost is an item that can be activated before a level is started when selecting the plants that lasts for the duration of that level. Any plant from that Seed Packet will do its Plant Food effect upon being planted. There are only two ways to activate it. One is to have a boost already obtained from the Zen Garden, which is obtained by fully growing a plant besides the Marigold in the Zen Garden, and choose the Seed Packet to a level plant. Another is to pay a varying price of gems (up to 15) to activate the boost for that level. Planting a plant with Plant Food boost on a Power Tile will not trigger the Power Tile, and only affect the planted plant.

Trivia

 * Pea Pod's plant food boost only activates on the first planting. Subsequent upgrade plantings to the plant does not activate the boost.
 * This also happens if you repair a boosted defensive plant with Wall-nut First Aid Upgrades.
 * This was fixed in the 2.3 update.
 * Plants with Plant Food Boost don't activate Power Tiles upon planting.
 * However, Puff-shroom's boost activate all other Puff-shrooms. Maybe that's why it costs 15 gems.