- Bahia
- Baja Red Fairy Duster
- Bamboo
- Dwarf
- Heavenly
- Rubro (Phyllostachys rubromarginata)
- Barberry
- Barberry, Crimson Pygmy
- Barberry, Japanese
- Barberry, Mentor
- Barberry, Red Leaf Japanese
- Barometer Plant
- Basketflower
- Basket-of-Gold
- Beach Wormwood
- Bean, Indian
- Bear Grass, Bigelow's
- Bearberry
- Beardgrass, Silver
 Bearded-Tongue- Bearded Iris
- Beargrass
- Beavertail Cactus
- Beebalms
- Bergenia, Winter-Flowering
- Bermudagrass
- Big Bluestem
- Big Leaf Periwinkle
- Bigelow's Bear Grass
- Big Sage
- Bigtooth Maple
- Binder
- Birch
- Birch, Cut Leaf
- Birch, European White
- Birch, River
- Bird of Paradise
- Bird's Nest Spruce
- Black Dalea
- Black-Eyed Susan
- Blackfoot Daisy
- Bladderpod, Fendler
- Blanketflower
- Blazing Stars
- Blue Ash
- Blue Atlas Cedar
- Blue Buttons
- Blue Palo Verde
- Bluebells, California
- Bluebells of Scotland
- Bluebonnets
- Blue Dicks
- Blue Fescue
- Blue Flag, Western
- Blue Flax
- Blue Grama Grass
- Blue Spruce
- Blue Vine, Australian
- Bluestar Flower
- Bluegrass, Kentucky
- Bluestem Grasses
- Border Forsythia
- Boston Ivy
- Boulevard Cypress
- Bounching Bet
- Box Elder
- Boxwood
- Brewer Lupine
- Bridal Bouquet
- Bristlecone Pine
- Bristly Prickly Pear
- Brittlebush
- Broom
- Broom, Centennial
- Broom, Desert
- Broom, Scotch
- Buckwheats
- Buffaloberry, Silver
- Buffalograss
- Bugle Weed
- Bulbs
- Bull Grass
- Bundleflower
- Burning Bush
- Bush, Dalea
- Bush, Morning Glory
- Butterfly Bush
- Butterfly Bush, Alternate Leaf
- Butterflyweed
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