Having read a few posts complaining that the standard underground crops make the game "too easy," I decided to post this small list of underground plants which can be used as a replacement for the standard ones. I've simply lifted these out of my Mesozoic Dwarves mod, where they are included to increase the challenge of farming underground and to encourage the player to work in the hostile outdoors. They're lower yielding, lower value, have limited growing seasons, and generally require more processing.
To use them as a replacement in the standard game, paste them into the matgloss_plant file and delete the entries for the standard crops that you want to remove (such as Plump Helmet, Cave Wheat, Sweet Pod, etc).
NOTE: If you remove Quarry Bush, you'll get crashes if you don't replace it with another [LEAVES] producing plant; I've included an example aboveground replacement here that will prevent the problem.
Ancient Underground Food/Drink Crops:[MATGLOSS_PLANT:CAVE_FERN]
[TILE:241][COLOR:7:0:0]
[NAME:cave fern][NAME_PLURAL:cave fern]
[SEED:7:0:0]
[SEEDNAME:cave fern spore]
[VALUE:1][GROWDUR:500]
[DRINK:cave beer:6:0:0]
[DRINKVALUE:1]
[MILL:cave flour:7:0:1]
[MILL_VALUE:10]
[COOKABLE_WHEN_MILLED]
[WET][DRY][BIOME:SUBTERRANEAN_WATER]
[SPRING][SUMMER][AUTUMN][WINTER]
[FREQUENCY:100]
[CLUSTERSIZE:2]
[EDIBLE_VERMIN]
[PREFSTRING:pale leaves]
[MATGLOSS_PLANT:LAVA_BLOSSOM]
[TILE:232][COLOR:7:0:1]
[NAME:lava blossom][NAME_PLURAL:lava blossom]
[SEEDNAME:lava blossom seeds]
[SEED:7:0:0]
[VALUE:2][GROWDUR:300]
[EXTRACT:lava blossom pulp:0:0:1]
[EXTRACTVALUE:15]
[EXTRACT_BARREL]
[EXTRACT_COOKABLE]
[WET][DRY][BIOME:SUBTERRANEAN_WATER]
[SPRING][SUMMER]
[FREQUENCY:100]
[CLUSTERSIZE:2]
[PREFSTRING:white petals]
[MATGLOSS_PLANT:WILD_PLUMP_HELMET]
[TILE:6][COLOR:5:0:0]
[NAME:wild plump helmet][NAME_PLURAL:wild plump helmets]
[SEEDNAME:wild plump helmet spawn]
[SEED:5:0:1]
[VALUE:2][GROWDUR:300]
[DRINK:cave wine:5:0:0]
[DRINKVALUE:2]
[WET][DRY][BIOME:SUBTERRANEAN_WATER]
[AUTUMN]
[FREQUENCY:100]
[CLUSTERSIZE:3]
[EDIBLE_VERMIN]
[EDIBLE_RAW]
[PREFSTRING:wrinkled tops]
Aboveground Replacement for Quarry Bush:[MATGLOSS_PLANT:ELDERMINT_CYCAD]
[TILE:227][COLOR:2:0:0]
[NAME:eldermint cycad][NAME_PLURAL:eldermint cycad]
[VALUE:2][GROWDUR:500]
[LEAVES:6]
[WET][DRY][BIOME:NOT_FREEZING]
[SPRING][SUMMER][AUTUMN]
[FREQUENCY:100]
[CLUSTERSIZE:5]
[PREFSTRING:aroma]
Summary of Replacement Plants:(x) = value
Subterranean:- Cave Fern(2) - brew(1), mill(10)
- Lava Blossom(2) - process to barrel(15)
- Wild Plump Helmet(2) - edible raw, brew(2)
Aboveground:- Eldermint Cycad(4) - leaves (process to bag)