conveniently, i play wormwood so i could offer up some advice. i'm certainly not the best player on the fourms (or ever), i can think of at least 2 other people here who probably know more about wormwood then i do, but here's what i got!:
feel free to ask questions about anything im saying here. i understand that sometimes my explanations are hard to follow ^^;;
rundown: wormwood is a plant, so a lot of his perks are plant related. mainly, he has an exclusive crafting tab, can plant seeds directly into the ground without a farm plot or hoe, the crops he plants last (iirc) 50% longer then others, he gains sanity when he plants new seeds and trees, and he blooms in spring, which gives him a 20% speed boost. his downsides are that he cannot heal from food (but he gains hunger and sanity) and he loses sanity when plants are destroyed
wormwood's best skill is farming. his seed perk can be used to circumvent the need of a hoe (or thingamarig, if you wish. i personally dont recommend it because seeds planted directly into the ground take 5-6 says to grow as opposed to the 3-4 in farm plots). using a hoe can take a while, especially if you have a lot of farm land. it also costs quite a bit of resources to keep making new hoes. his bloom also automatically tends to crops in a radius, meaning that when you're fully bloomed, you just have to run around the plot for a second and all the plants are happy. he's also great for early game living logs, because at the cost of 20 hp, he can make one. tree guards don't usually become common until ~day 100 of the world. and once you have ways of healing yourself comfortably (i'll go more into that later), it's a good investment. the other things in his crafting tab are ok, i personally just use bramble husk to pick cacti and fight off the big tentacle whenever we go to face the fuelweaver. i've found success in using the bramble trap very early on as hound control, then later upgrading to tooth traps when with a lot more hound teeth
- wormwood's inability to heal from food can be tough to deal with in the early game, but its super good to note that he can heal off of things like spider glands. later down the line, i like to bring around honey poultices and healing salves because a quick +20 hp is pretty nice. i also personally tend to have compost wraps (wormwood exclusive healing item) for +30. tents and siesta-lean-tos are also amazing for wormwood, especially since he can make so much food to quickly recover the hunger he slept off. i dont tend to use manure/guano/rot that often unless i took very miniscule amounts of damage and dont want to waste my larger heals on fixing it.
- wormwood's bloom is super nice because its more speed at relatively little cost (he goes have an increased hunger drain, but it's barely noticeable). bloom happens automatically in spring but with reap what you sow, it's possible to have wormwood bloom year around. certain fertilizers applies to wormwood will trigger the bloom cycle. the easiest one to obtain early game is spoiled fish (letting fish morsels spoil). i use glommer goop later in the game because when a world goes on for a while, it gets easy to collect (+ it heals you, on top of starting the bloom cycle). it takes 3 days to fully bloom and i usually reapply fertilizer when wormwood starts to un-bloom (for lack of a better term)
- wormwood has some of the best sanity management measures in the game. planting seeds/crops gives more sanity then destroying them. you don't have to often worry about losing sanity to chopping trees or digging up crops, because wormwood will gain more sanity by planting them down then he lost by destroying them. iirc, most plants give a net +5 to sanity. i usually end up keeping a whole lot of random seeds in my inventory to plant around when i start going crazy, and it leads to little silly moments where people find random crops growing around the world (also serves as emergency food! i had to rely on my own random seeds once)
- bloom has 60 points of overheating protection in summer. gives you a little bit longer to find a way to cool down
- wormwood's health won't be affected at all by food, including negative effects. if you accidentally made a monster lasagna or something, wormwood can eat it with relatively little consequence
- bees are neutral towards wormwood, even in spring when they all become killer bees. they are attracted to wormwood, especially when he's in bloom
- wormwood is immune to the effects of fire nettles and bindweeds so he can safely remove them from gardens
also wormwood has THE best skins in the game. i especially love triumphant and hollow
if anyone else wants to add anything to this, please do!