Quick answer: 69 native Connecticut plants have a recorded bloom range that includes June.
69 species
- American basswood Tilia americana · 32 states
- American bellflower Campanulastrum americanum · 19 states
- American bittersweet Celastrus scandens · 11 states
- American cranberry Vaccinium macrocarpon · 2 states
- American holly Ilex opaca · 24 states
- American mountain ash Sorbus americana · 18 states
- Beach plum Prunus maritima · 2 states
- Birdfoot violet Viola pedata · 14 states
- Black cherry Prunus serotina · 32 states
- Black tupelo Nyssa sylvatica · 19 states
- Black-eyed Susan Rudbeckia hirta · 42 states
- Blue vervain Verbena hastata · 11 states
- Bluebead Clintonia borealis · 1 states
- Butterflyweed Asclepias tuberosa · 37 states
- Canada anemone Anemone canadensis · 22 states
- Canadian burnet Sanguisorba canadensis · 1 states
- Canadian wild ginger Asarum canadense · 8 states
- Cardinal flower Lobelia cardinalis · 37 states
- Chokecherry Prunus virginiana · 35 states
- Cinnamon fern Osmunda cinnamomea · 13 states
- Common winterberry Ilex verticillata · 10 states
- Common yarrow Achillea millefolium · 31 states
- Creeping phlox Phlox subulata · 11 states
- Eastern red columbine Aquilegia canadensis · 36 states
- Eastern teaberry Gaultheria procumbens · 9 states
- Fire pink Silene virginica · 8 states
- Fireweed Chamerion angustifolium · 28 states
- Flowering dogwood Cornus florida · 22 states
- Foxglove beardtongue Penstemon digitalis · 31 states
- Golden alexanders Zizia aurea · 12 states
- Hairy beardtongue Penstemon hirsutus · 10 states
- Harebell Campanula rotundifolia · 25 states
- Heart-leaved meadow parsnip Zizia aptera · 8 states
- Heartleaf foamflower Tiarella cordifolia · 2 states
- Highbush blueberry Vaccinium corymbosum · 4 states
- Inkberry Ilex glabra · 4 states
- Jack-in-the-pulpit Arisaema triphyllum · 14 states
- King of the meadow Thalictrum pubescens · 1 states
- Lanceleaf coreopsis Coreopsis lanceolata · 28 states
- Little bluestem Schizachyrium scoparium · 23 states
- Low prickly pear Opuntia humifusa · 6 states
- Lowbush blueberry Vaccinium angustifolium · 14 states
- Mapleleaf viburnum Viburnum acerifolium · 5 states
- Mountain laurel Kalmia latifolia · 17 states
- Nannyberry Viburnum lentago · 23 states
- Narrowleaf evening-primrose Oenothera fruticosa · 10 states
- New Jersey tea Ceanothus americanus · 31 states
- Northern blue flag Iris versicolor · 1 states
- Pagoda dogwood Cornus alternifolia · 25 states
- Partridgeberry Mitchella repens · 17 states
- Pearly everlasting Anaphalis margaritacea · 18 states
- Purple milkweed Asclepias purpurascens · 1 states
- Red baneberry Actaea rubra · 22 states
- Red-osier dogwood Cornus sericea · 22 states
- Scarlet beebalm Monarda didyma · 18 states
- Shagbark hickory Carya ovata · 22 states
- Showy tick trefoil Desmodium canadense · 21 states
- Smooth Solomon's seal Polygonatum biflorum · 13 states
- Spotted beebalm Monarda punctata · 14 states
- Staghorn sumac Rhus typhina · 13 states
- Sundial lupine Lupinus perennis · 25 states
- Swamp rose Rosa palustris · 11 states
- Sweet-fern Comptonia peregrina · 10 states
- Trumpet vine Campsis radicans · 24 states
- Tulip tree Liriodendron tulipifera · 17 states
- Virginia creeper Parthenocissus quinquefolia · 27 states
- Virginia spiderwort Tradescantia virginiana · 2 states
- White baneberry Actaea pachypoda · 16 states
- Wild geranium Geranium maculatum · 11 states