Sun Flowers
Hybrid Dog

This mod generates flowers which close their heads at night.

Basalt + Fertilizer
Daniel

Adds basalt to the underground which can be made into fertilizer. Useful for farming flowers if you need dye for colored nodes.

Hades Endgame
VeproGames

Adds various goodies to Hades Revisited, focused on Late/Endgame

Wilhelmines Living Desert
Liil

Adds plants to the default deserts of minetest game.

Bamboo
AwesomeDragon97

Adds bamboo which generates in jungles and can be used as a crafting ingredient.

Rubber Addon for MineClone
Biochemist

Adds rubber and related Items to MineClone.

Wilhelmines Natural Biomes
Liil

Adds 9 new biomes

Herbs
Clyde

Adds 15 flowers and 6 mushrooms.

Wildflower Fields
mzs.112000

Adds a wildflower field biome to Minetest Game.

KSurvive 2
MadKamel

A game built 100% from scratch, including code, textures and sounds.

NodeCore Nature: Revised
Warr1024

Updated, fixed, enhanced edition of Winter94's NodeCore Nature

Euthamia
Avicennia_g

Grassy Goldenrod plant for Nodecore

Beautiful Flowers
1faco

Adds many flowers to MT

Loria (alpha)
siegment

Survival in hardcore acid-alien sci-fi themed world

Algae
Just_Visiting

Algae mapgen addition to "Minetest Game"

Giant Mushroom/ Mushrooms
Hybrid Dog

Add mushrooms and giant mushrooms.

XaEnvironment
AiTechEye

A game that aims to contain lots of environments and things.

Valleys Mapgen
Gaël de Sailly

A map generator with valleys, rivers, mountains and many plants.

Plantlife
mt-mods

Adds various kinds of plants, fruit bushes, fallen trees, and a whole host of foliage and other ground cover.

More Trees!
mt-mods

Adds a whole bunch of new types of trees, some bearing fruit or similar

Ethereal NG
TenPlus1

Adds many new biomes, items and mechanics into the world.

Caverealms Lite
Shara

A mod for Minetest to add underground realms.