Metrogrown

Metrogrowns are auxiliary plants help surrounding plants attack at the same time.

Overview
Metrogrowns only affect offensive plants in a 3x3 area. Here, it causes all of the plants to attack the rate of a Peashooter. For instance, Cabbage-pults would attack at a faster rate, and Bonk Choys would attack at a slower rate.

Metrogrown does not affect plants with a cool-down, such as Citron or Jack-O'- Lantern.

A smaller side effect of Metrogrown is that it gains 5 ndb of health when it is planted around a defensive plant. However, this health increase is small and overall useless, though it may help in some circumstances.

Metrogrown is based off of the metronome, an instrument used by musicians to synchronize their music to a set beat or pulse. Though it is not based on any specific plant, Metrogrown's woody body may make it loosely based off of tree saplings.

Plant Food Ability
When Plant Food is used on Metrogrown, it increases its beats to every 0.75 of a second. This increases the rate of fire around it. It also completely heals the Metrogrown.

Strategies
Metrogrown works best on pult plants. Plants like Cabbage-pult and Melon-pult can send out damaging projectiles for a cheaper cost than the equivalent amount of Peashooters. However, Metrogrown's 150 sun-cost causes a net damage-per-sun profit to be delayed.

Metrogrown does not work well with plants such as Bonk Choy, Celery Stalker, and Wasabi Whip, as it decreases their rate-of-damage.