This information is largely taken from Chichis' table in
Nutrients. The potency categories should be used as guidelines, as cooking skill and interaction with other ingredients may well change your results.
Endurance
Ultra High Potency
Patchouli
High Potency
Dewplant, Moon Aloe, Naranga, Panoe, Shrubby Basil, Sky Gladalia, Yellow Tristeria
Medium Potency
Bhillawa, Chaffa, Cinquefoil, Creeping Thyme, Crumpled Leaf Basil, Dameshood, Earth Apple, Finlow, Ginseng Root, Jaivanti, Lemondrop, Purple Tintiri, Revivia, Scaley Hardwood, Shyama, Xanosi, Yava
Low Potency
Ashoka, Black Pepper Plant, Cinnamon, Common Sage, Fleabane, Golden Thyme
Speed
Ultra High Potency
Bloodwort, Crimson Clover, Thunder Plant
Very High Potency
Umber Basil
High Potency
Blue Damia, Cirallis, Dwarf Wild Lettuce, Elegia, Paradise Lily,
Medium Potency
Bhillawa, Blue Tarafern, Blushing Blossom, Crimson Lettuce, Deadly Catsclaw, Dusty Blue Sage, Garcinia, Ginger Root, Ice Mint, Lavender Navarre,
Lemon Grass,
Maragosa,
Myrrh,
Pippali,
Sagar Ghota,
Sandy Dustweed,
Tangerine Dream,
Tsangto
Curly Sage
Low Potency
Altar's Blessing,
Common Basil,
Honey Mint,
Houseleek,
Meadowsweet,
Mountain Mint,
Tiny Clover,
Wild Lettuce
Focus
Ultra High Potency
Patchouli
Very High Potency
Apothecary's Scythe, Wild Garlic
High Potency
Enchanter's Plant,
Fire Allspice,
Royal Rosemary,
Sky Gladalia
Medium Potency
Blood Balm,
Blood Blossom,
Covage,
Creeping Thyme,
Crimson Lettuce,
Dank Mullien,
Fivesleaf,
Gokhru,
Lemon Grass,
Nubian Liquorice,
Orange Niali,
Prisniparni,
Revivia,
Scaley Hardwood,
Shrub Sage,
Spinach,
Whitebelly,
Wild Onion,
Wood Sage,
Yigory
Low Potency
Camelmint,
Cardamom,
Dalchini,
Honey Mint,
Indigo Damia,
Mountain Mint
Perception
Ultra High Potency
Mandrake Root,
Spinnea
Very High Potency
Turtle's Shell
High Potency
Cranesbill,
Crimson Windleaf,
Dewplant,
Lavender Scented Thyme,
Sandalwood
Medium Potency
Cicada Bean,
Cinquefoil,
Garlic Chives,
Ice Blossom,
Katako Root,
Maragosa,
Myrrh,
Pale Dhamasa,
Rubia,
Shrub Sage,
Soapwort,
Strychnos,
Tamarask,
Thyme,
Xanosi
Low Potency
Common Rosemary,
Daggerleaf,
Pale Russet,
Sorrel
Strength
Ultra High Potency
Bloodwort,
Crimson Clover,
Curly Sage,
King's Coin,
Thunder Plant
Very High Potency
Tristeria,
Turtle's Shell
High Potency
Blueberry Tea Tree,
Burnt Tarragon,
Crimson Nightshade,
Enchanter's Plant,
Liquorice,
Panoe,
Red Pepper Plant,
Shyamalata,
Silvertongue Damia,
White Pepper Plant
Medium Potency
Bay Tree,
Bluebottle Clover (negative dexterity),
Crumpled Leaf Basil,
Dank Mullien (negative dexterity),
Earth Apple,
Homesteader's Palm,
Ice Blossom,
Jaiyanti,
Pippali,
Prisniparni,
Pulmonaria Opal,
Strychnos (negative dexterity),
Sugar Cane (negative dexterity),
Tsangto (negative dexterity),
Weeping Patala,
Whitebelly (negative dexterity),
Wild Onion
Low Potency
Fleabane (negative dexterity),
Pale Russet (negative dexterity)
Dexterity
Ultra High Potency
Blood Root,
Mandrake Root (negative strength),
Octec's Grace
Very High Potency
Apothecary's Scythe,
Xanat
High Potency
Chukkah,
Cranesbill,
Fire Lily (negative strength),
Fumitory (negative strength),
Joy of the Mountain,
Shyamalata
Medium Potency
Blushing Blossom (negative strength),
Dameshood (negative strength),
Deadly Catsclaw,
Deadwood Tree,
Garcinia,
Nubian Liquorice (negative strength),
Rubia (negative strength),
Sagar Ghota,
Sandy Dustweed,
Spinach
Low Potency
Altar's Blessing (negative strength),
Common Sage
This is taken from a posting by Chichis on the forums... blame errors on me, blame success on Chichis. - Sabt-Pestnu