For a simple early-game deck, Torchwood is a great plant to have a few of in a deck, along with many pea plants. Even better, Torchwood itself is part of the Mega-Grow class, so you can also try boosting it with Fertilize or Embiggen, though the latter can only be used by Green Shadow and Captain Combustible.
As said by the tutorial of the game, Template:PvZHLink behind a Torchwood is a good strategy, as Repeater is able to do a lot of damage to a zombie or the zombie hero with a total of 8 damage. Other pea plants can substitute and even replace Repeater, for example, Skyshooter, Template:PvZHLink, or Template:PvZHLink. Additionally, Torchwood can be used as a cheap wall due to its relatively high durability for cost. Usually, Torchwood will survive and then the player could play a pea plant for more damage. Black-Eyed Pea can become a very big threat with Torchwood, as it will limit the zombie hero for trick usage, as well as being a very powerful plant early in the match. Unlike the main series games, Torchwood can boost Template:PvZHLink's strength without thawing its ice pea and protect it, making it more powerful. It can also be used to tank some hits, as 3 health is considerably a lot on the 1st turn.
If you are short of attacking plants, you can use boosting tricks on Torchwood as a last resort.
Against
Because of its health, Torchwood can be difficult to dispose of until later into the game. Tricks such as Nibble, Locust Swarm, and Rocket Science can be used to attack the plant protected by Torchwood, or the Torchwood itself can be destroyed by tricks like Rolling Stone and Weed Spray. If the player is Electric Boogaloo or Professor Brainstorm, they can use Electrobolt against this. Another strategy is to allow Torchwood to live and boost the pea plant's attack, making the pea plant vulnerable to Rocket Science and Cut Down to Size.
Additionally, you can simply move the pea plant using Sumo Wrestler or Terrify into another lane, leaving them vulnerable to attack while losing the boost they gained from Torchwood. Moving this under a pea will greatly help you too, as it can not boost the pea.