The Complete Manual to 4546B's Plants: Ornamental, Edible and More!

First off, this is your spoiler warning. Some of the plants, crafting recipes and biomes will be spoilers, so use this guide at your own discretion.

Steam's organization for guides isn't perfect so here's a more detailed tree of the categories and subcategories for all the plants to make your navigational experience better. My way of splitting the plants doesn't fully match up with the PDA Database's since there are a few plants that seem mis-categorized in my opinion. I also decided to include plants with any food or H2O stats since that is useful to know for an emergency, regardless of if it's calorically significant.

Not Growable
-Land
*Unharvestable
*Harvestable
-Sea
*Unharvestable
*Harvestable

Grown for Crafting
-Land
-Sea

Grown for Food
-Land
-Sea

Grown for Crafting & Food
-Land
-Sea

Grown as Decor
-Sea

Unharvestable:
Ancient Ornamental Plant
Found at:
Deep Lilypads Cave Cache Blue Scrub Brush
Found at:
Delta Island
East Arctic
Outpost Zero
Shallow Twisty Bridges Frost Acacia
Found at:
Glacial Basin
Glacial Forest Frosted Sinew Tree
Found at:
Glacial Basin
Glacial Bay Glow Fungus
Found at:
Glacial Basin
-Dark Caves Grub Basket
Found at:
Deep Lilypads Cave Cache Honeycomb Fungus
Found at:
Delta Island
East Arctic
West Arctic Marbled Anemone
Found at:
Glacial Basin
-Temperate Caves Pouch Bulb
Found at:
Glacial Bay
West Arctic Speckled Rattler
Found at:
Deep Lilypads Cave Cache Thermal Lily
Found at:
Delta Island
East Arctic
Shallow Twisty Bridges
West Arctic Violet Snowcone
Found at:
Glacial Bay
West Arctic Voxel Shrub
Found at:
Deep Lilypads Cave Cache -------------------------------------------------------------------------------------------------------
Unharvestable:
Blooming Raindrops
Found at:
Crystal Caves
Lilypad Islands
Thermal Spires
Tree Spires Broken Mandrake
Found at:
Deep Twisty Bridges Crescent Moon Coral
Found at:
Shallow Twisty Bridges
Twisty Bridges Double Lung Plant
Found at:
Shallow Twisty Bridges Eclipse Plant
Found at:
Fabricator Caverns Grand Cotton Anemone
Found at:
Deep Lilypads Cave Green Ternion
Found at:
Deep Lilypads Cave
Lilypad Island
Lilypads Crevice Jade Membrane
Found at:
Crystal Caves Lily Pad
Found at:
Deep Lilypads Cave
Lilypad Island
Lilypads Crevice

Forms:
Lilypad Root
Seedling Lilypad
Adolescent Lilypad
Rising Lilypad
Mature Lilypad
Fallen Lilypad

Loop Plant
Found at:
Deep Lilypads Cave Luna Plant
Found at:
Shallow Twisty Bridges Pink Narrowleaf
Found at:
Shallow Twisty Bridges
Twisty Bridges
Twisty Bridges Caves Polycage
Found at:
Crystal Caves Purple Cattail
Found at:
Lilypad Islands
Lilypad Crevice Radiant Sieve Coral
Found at:
Arctic Kelp Caves
Glacial Connecton
Lilypads Crevice
Lilypad Islands
Thermal Spires Ragged Pitcher Plant
Found at:
Deep Purple Vents
Purple Vents Reaper's Wineglass
Found at:
Crystal Caves
Thermal Spires
Tree Spires Scaly Maw Anemone
Found at:
Shallow Twisty Bridges Shelf Coral
Found at:
Shallow Twisty Bridges
Twisty Bridges
Twisty Bridges Caves Tornado Plates
Found at:
Thermal Spires
Tree Spires Trinity Barnacle
Found at:
Thermal Spires
Tech Sites
Twisty Bridges Twisted Mandrake
Found at:
Twisty Bridges
Shallow Twisty Bridges Harvestable:
Frost Anemone
Found at:
East Arctic
Sparse Arctic

Harvest:
Frost Anemone Heart
(Edible)

Nutritional Info:

Kelproot
Found at:
Arctic Kelp Caves

Harvest:
Root Pustule
(Craftable)

Crafting Recipes:
Architect Tissues

Other Use:
Bioreactor Fuel

Oxygen Plant
Found at:
Arctic Kelp Forest
Arctic Kelp Caves
Deep Lilypads Caves
Deep Twisty Bridges
Koppa Mining Site
Lilypad Islands
Thermal Spires Caves
Twisty Bridges Harvest:

Sulfur Plant
Found at:
Arctic Kelp Caves
Crystal Caves
Purple Vents
Twisty Bridges

Frost Vase Plant
Found at:
East Arctic
Glacial Basin

Harvest:
Frost Vase Plant
(Craftable)
Frost Vase Seed

Crafting Recipes:
Water Purification Tablet
Antidote

-------------------------------------------------------------------------------------------------------
Ribbon Plant
Found at:
Crystal Caves
Glacial Basin
Glacial Connection
Lilypad Islands
Shallow Twisty Bridges
Twisty Bridges

Harvest:
Ribbon Plant
(Craftable)
Ribbon Plant Seed

Crafting Recipes:
Battery
Benzene
Spiral Plant
Found at:
Deep Purple Vents
Tree Spires
-Vent Gardens

Harvest:
Spiral Plant Clipping
(Craftable+Seed)

Crafting Recipes:
Synthetic Fibers

Young Cotton Anemone
Found at:
Deep Lilypads Cave

Harvest:
Young Cotton Anemone
(Craftable)
Yound Cotton Anemone Seed

Crafting Recipes:
Hydrochloric Acid

Chinese Potato Plant
Found at:
Marguerit's Greenhouse

Harvest:
Chinese Potato
(Edible+Seed)

Nutritional Info:
Fevered Pepper Tree
Found at:
Arctic Spires
East Arctic
Glacial Basin
Glacial Bay
West Arctic

Harvest:
Chinese Potato
(Edible+Seed)

Nutritional Info:

Horseshoe Shrub
Found at:
Delta Island
Marguerit's Greenhouse

Harvest:
Shrub Nut
(Edible+Seed)

Nutritional Info:
Lantern Tree
Found at:
Outpost Zero

Harvest:
Lantern Fruit
(Edible+Seed)

Nutritional Info:
Marblemelon Plant
Found at:
Marguerit's Greenhouse

Harvest:
Marblemelon
(Edible)
Marblemelon Seeds

Nutritional Info:

------------------------------------------------------------------------------------------------------
Antennae Plant
Found at:
Lilypad Islands
Lilypad Island Caves
Lilypad Crevice
Omega Outpost

Harvest:
Antannae Fruit
(Edible)
Antannae Seed

Nutritional Info:

Bullseye Shroom
Found at:
Shallow Twisty Bridges

Harvest:
Bullseye Shroom Piece
(Edible+Seed)

Nutritional Info:

Preston's Plant
Found at:
Marguerit's Greenhouse

Harvest:
Preston's Plant Leaf
(Craftable)
Preston's Delight
(Edible)

Nutritional Info:

Crafting Recipe:
Spicy Fruit Salad
-------------------------------------------------------------------------------------------------------
Creepvine
Found at:
Arctic Kelp Forest
East Arctic
Glacial Bay
Glacial Connection
West Arctic

Harvest:
Creepvine Sample
(Edible+Seed+Craftable)

Nutritional Info:

Crafting Recipe:
Fiber Mesh

Harvest:
Creepvine Seeds
(Edible+Seed+Craftable)

Gel Sack
Found at:
Deep Twisty Bridges
Deep Purple Vents
Lilypad Islands
Lilypad Island Caves
Lilypad Island Crevice

Hardy Cave Bush
Found at:
Glacial Bay
Glacial Connection
Lilypad Islands
Thermal Spires
West Arctic

Harvest:
Cave Bush Seed

Redwort
Found at:
Arctic Kelp Forest
East Arctic
Glacial Connection
Shallow Twisty Bridges
Twisty Bridges

Harvest:
Redwort Seed

Spotted Dockleaf
Found at:
Lilypad Islands
(Check around fallen lilypads)

Harvest:
Spotted Dockleaf Seed

Violet Beau
Found at:
Arctic Kelp Forest
East Arctic
Glacial Basin
Glacial Bay
Glacial Connection
Lilypad Islands
Thermal Spires
West Arctic

Sometimes it's not so intuitive which plants can be interacted with, and the PDA doesn't sort that way.
I hope this guide was helpful at least for organizational purposes, and thanks for reading! If it was helpful to you feel free to leave a like or favorite.

❅ If my guides were helpful I accept tips: https://ko-fi.com/raptvr3 ❅

Also check out my other Subnautica: Below Zero guide:
https://steamcommunity.com/sharedfiles/filedetails/?id=2100915424