Upgrade Laboratory

Get ready to the very exciting feature of The New Plants vs. Zombies! The Upgrade Laboratory upgrades your seed packets, increasing their power and toughness. Upgraded seed packets are better than the normal ones, but of course they're more expensive! Your normal seed packets are in D Grade. You can upgrade each seed packet for 3 times (From D to C to B to A). Let's see what are the new stats for upgraded seed packets!

Opinion
This page isn't done yet. I'm not sure about the upgrade cost. Please comment if the upgrade cost is too high or too low :)