Beta-Carrotina knows she can always count on him to get to the root of the problem.
Update history
Update 1.16.10
Added to the game.
Strategies
With
This plant is really useful as you can block and destroy dangerous threats in the early game like Mini-Ninja or any zombie that has 2 or less. His Team-Up trait can also be used to protect a plant or to keep him alive if you want to play another plant to protect him. But what's even better is that he also Conjures a root, giving you a free card draw, which is quite similar to Immorticia's signature superpower (if Zom-Bats lasts only for a turn). The root he Conjures can be ranged from an average Template:PvZHLink to a powerful Soul Patch.
Being in a root tribe as well as him Conjuring a root, this can benefit Starch-Lord well as it makes both him and the root plant he Conjures stronger when they are played.
You can also use Rescue Radish to bounce Lieutenant Carrotron and play him again to Conjure another root as well.
Against
There is no way to stop this plant's ability as it Conjures a free root card for the plant hero. Take caution when he is played, especially if Starch-Lord is on the field. Otherwise, he is simply a 2/1 plant with Team-Up. You can generally treat this plant like Shellery, as they have the same stats, trait, and class, but with root synergy.
Take note that it is not a good option to Bounce him, because he can be played again and give your opponent another root.