Plant WitchPlants: B
- Blue Throatwort Trachelium caeruleum Garden perennial
- Blue Treasure Honeyberry Lonicera caerulea Berry
- Blue Vervain Verbena hastata Wildflower
- Blue Wild Indigo Baptisia australis Wildflower
- Blue Wood Sedge Carex flaccosperma Grass sedge
- Blue-Eyed Grass Sisyrinchium angustifolium Wildflower
- Blue-Eyed Mary Omphalodes verna Creeping perennial
- Blue-Stemmed Goldenrod Solidago caesia Wildflower
- Bluebeard Caryopteris × clandonensis Flowering shrub
- Blueberry Vaccinium corymbosum Berry
- Bluedicks Dichelostemma capitatum Wildflower
- Bluestar Amsonia tabernaemontana Garden perennial
- Bluestem Beardtongue Penstemon cyanocaulis Wildflower
- Bluets Houstonia caerulea Wildflower
- Bodnant Viburnum Viburnum × bodnantense Flowering shrub
- Bog Sage Salvia uliginosa Garden perennial
- Bok Choy Brassica rapa subsp. chinensis Brassica
- Bokhara Tulip Tulipa linifolia Garden perennial
- Boneset Eupatorium perfoliatum Wildflower
- Borage Borago officinalis Herb
- Border Forsythia Forsythia × intermedia Flowering shrub
- Boston Fern Nephrolepis exaltata Fern
- Bottle Gentian Gentiana andrewsii Wildflower
- Bottlebrush Buckeye Aesculus parviflora Flowering shrub
- Bougainvillea Bougainvillea spectabilis Flowering shrub
- Bowden Lily Nerine bowdenii Bulb
- Bower Vine Pandorea jasminoides Vine
- Box Huckleberry Gaylussacia brachycera Creeping perennial
- Bradbury's Beebalm Monarda bradburiana Wildflower
- Brass Buttons Leptinella squalida Creeping perennial
- Brazilian Jasmine Mandevilla sanderi Vine
- Breadseed Poppy Papaver somniferum Garden annual
- Bridal Wreath Spirea Spiraea prunifolia Flowering shrub
- Bristleleaf Sedge Carex eburnea Grass sedge
- Bristly Locust Robinia hispida Flowering shrub
- Brittlebush Encelia farinosa Flowering shrub
- Broad Beech Fern Phegopteris hexagonoptera Fern
- Broadbeard Beardtongue Penstemon angustifolius Wildflower
- Broadleaf Arrowhead Sagittaria latifolia Root
- Broadleaf Cattail Typha latifolia Leafy
- Broadleaf Grape Hyacinth Muscari latifolium Garden perennial
- Broadleaf Lupine Lupinus latifolius Wildflower
- Broadleaf Milkweed Asclepias latifolia
- Broadleaf Stonecrop Sedum spathulifolium Creeping perennial
- Broccoli Brassica oleracea var. italica Brassica
- Broccoli Rabe Brassica rapa subsp. sylvestris Brassica
- Brown's Honeysuckle Lonicera × brownii Flowering shrub
- Brown-Eyed Susan Rudbeckia triloba Wildflower
- Brussels Sprout Brassica oleracea var. gemmifera Brassica
- Buckbrush Ceanothus cuneatus Flowering shrub
- Buckwheat Fagopyrum esculentum Grain
- Buffalograss Bouteloua dactyloides Creeping perennial
- Bugle Lily Watsonia borbonica Garden perennial
- Bugleweed Ajuga reptans Creeping perennial
- Bumald Spirea Spiraea × bumalda Flowering shrub
- Bunchberry Cornus canadensis Creeping perennial
- Burdock Arctium lappa Root
- Burkwood Viburnum Viburnum × burkwoodii Flowering shrub
- Bush Allamanda Allamanda schottii Flowering shrub
- Bush Anemone Carpenteria californica Flowering shrub
- Bush Clover Lespedeza thunbergii Flowering shrub
- Bush Morning Glory Ipomoea leptophylla Wildflower
- Bush Sunflower Simsia calva
- Bush Violet Browallia speciosa Garden annual
- Bushy Aster Symphyotrichum dumosum
- Butter Daisy Melampodium divaricatum Garden annual
- Buttercup Winter Hazel Corylopsis pauciflora Flowering shrub
- Butterfly Bush Buddleja davidii Flowering shrub
- Butterfly Flower Schizanthus pinnatus Garden annual
- Butterfly Mariposa Lily Calochortus venustus Wildflower
- Butterfly Pea Clitoria ternatea Legume
- Butterfly Weed Asclepias tuberosa Wildflower
- Butternut Juglans cinerea Nut
- Butternut Squash Cucurbita moschata Fruiting
- Buttonbush Cephalanthus occidentalis Flowering shrub
- Byzantine Gladiolus Gladiolus communis Garden perennial