Board Thread:Plants vs. Zombies 2: It's About Time/@comment-4804333-20140331135854/@comment-4804333-20140331154926

You do realise that it only costs 0 sun on the 1st plant.

The tile turnip's sun cost increases exponentially based on how many tiles you've made with the plant.

So this means that the 2nd tile would cost 250 sun,

The 3rd tile costs 500 sun,

The 4th costs 1000 sun,

The 5th costs 2000 sun and so on and so forth...