Spike producer plant is a plant that every 5 seconds, it will produce spikes on the square in front of it, the spikes deal 3 damage, and 5 spikes are produced at time. If there the spikes can deal damage on shield zombies, but can't deal damage to the flying zombies. A square can have at maximum 40 spikes. It costs 400 sun, and has a fast recharge.
- This is based on the spike factory of bloons TD.