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Data Enrichment

Plants with GDD Data

Plants with growing degree day thresholds in their phenological calendar. These profiles power the Regional Season Tracker charts.

198 of 2039 plants

(Eastern) White Oak

'Bud break': 725 GDD₃₂

Adirondack Crabapple

Beginning of flowering: 1170 GDD₃₂, Full bloom: 1706 GDD₃₂

Allegheny Serviceberry

'First bloom': 770 GDD₃₂, 'Full bloom': 838 GDD₃₂

American Elderberry

'First bloom': 2450 GDD₃₂, 'Full bloom': 2878 GDD₃₂

'Full bloom': 394 GDD₃₂, 'First bloom': 461 GDD₃₂, 'Bud break': 879 GDD₃₂, 'Leaf emergence': 886 GDD₃₂

Beginning of flowering: 2113 GDD₃₂, Full bloom: 2440 GDD₃₂

American Smoketree

'Full bloom': 2450 GDD₃₂

American Yellowwood

'First bloom': 2049 GDD₃₂, 'Full bloom': 2336 GDD₃₂

Apple Serviceberry

Beginning of flowering: 980 GDD₃₂, Full bloom: 941 GDD₃₂

'First bloom': 922 GDD₃₂, 'Full bloom': 1056 GDD₃₂

Arrowwood Viburnum

'First bloom': 1815 GDD₃₂, 'Full bloom': 2108 GDD₃₂

'First bloom': 3276 GDD₃₂

'Leaf emergence': 1586 GDD₃₂, 'Bud break': 3647 GDD₃₂

'First bloom': 1370 GDD₃₂, 'Full bloom': 1697 GDD₃₂

Beginning of flowering: 3864 GDD₃₂

Big Huckleberry

'Bud break': 607 GDD₃₂, 'Leaf emergence': 780 GDD₃₂, 'First bloom': 1033 GDD₃₂

'Bud break': 1021 GDD₃₂, 'Flower buds visible': 1096 GDD₃₂, 'First bloom': 1169 GDD₃₂, 'Full bloom': 1279 GDD₃₂, 'Leaf emergence': 1337 GDD₃₂, 'Fall color / leaf senescence': 2962 GDD₃₂

'Bud break': 1144 GDD₃₂, 'Flower buds visible': 1252 GDD₃₂, 'Leaf emergence': 1276 GDD₃₂, 'First bloom': 1428 GDD₃₂

Bitterbrush Antelope Brush Antelope Bitterbrush

'Flower buds visible': 1021 GDD₃₂, 'First bloom': 1214 GDD₃₂

Beginning of flowering: 1656 GDD₃₂

Black Cottonwood

'Bud break': 737 GDD₃₂, 'Full bloom': 894 GDD₃₂, 'First bloom': 1006 GDD₃₂, 'Leaf emergence': 1144 GDD₃₂, 'Flower buds visible': 1353 GDD₃₂

'Bud break': 926 GDD₃₂, 'Flower buds visible': 1112 GDD₃₂, 'Leaf emergence': 1294 GDD₃₂, 'First bloom': 1412 GDD₃₂

Bloom start: 1566 GDD₃₂, Full bloom: 1835 GDD₃₂

'Bud break': 1410 GDD₃₂, 'Leaf emergence': 1526 GDD₃₂, 'Flower buds visible': 1671 GDD₃₂

Blackhaw Viburnum

'First bloom': 1008 GDD₃₂, 'Full bloom': 1200 GDD₃₂

Beginning of flowering: 577 GDD₃₂

'Flower buds visible': 1473 GDD₃₂

Blue Elderberry

'Bud break': 812 GDD₃₂, 'Leaf emergence': 1326 GDD₃₂

Blue False Indigo

'First bloom': 1638 GDD₃₂

Bottlebrush Buckeye

'First bloom': 3024 GDD₃₂, 'Full bloom': 3330 GDD₃₂

Box Huckleberry

'Flower buds visible': 680 GDD₃₂, 'First bloom': 1010 GDD₃₂, 'Bud break': 1333 GDD₃₂

'Bud break': 1212 GDD₃₂, 'Full bloom': 1495 GDD₃₂, 'Leaf emergence': 1514 GDD₃₂, 'Flower buds visible': 1572 GDD₃₂, 'First bloom': 1594 GDD₃₂, 'Fall color / leaf senescence': 1774 GDD₃₂

'Flower buds visible': 1199 GDD₃₂, 'First bloom': 1400 GDD₃₂

Beginning of flowering: 3352 GDD₃₂

Beginning of flowering: 3405 GDD₃₂

California Black Oak

'Leaf emergence': 3533 GDD₃₂

Dormancy break / bud swell: 285 GDD₃₂, Green tip / leaf emergence: 475 GDD₃₂, Beginning of flowering: 713 GDD₃₂, Full bloom: 864 GDD₃₂, End of flowering / petal fall: 1071 GDD₃₂

Carolina Allspice

'First bloom': 1270 GDD₃₂

Carolina Silverbell Mountain Silverbell

Bloom start: 959 GDD₃₂, Full bloom: 1197 GDD₃₂

Cascara Cascara Buckthorn

'Bud break': 856 GDD₃₂, 'Leaf emergence': 981 GDD₃₂, 'First bloom': 1613 GDD₃₂

Catawba Rhododendron

'First bloom': 1325 GDD₃₂, 'Full bloom': 1580 GDD₃₂

Beginning of flowering: 835 GDD₃₂

Chinese Fringetree

'Full bloom': 1932 GDD₃₂

Chinese Lilac Rouen Lilac

'Bud break': 511 GDD₃₂, 'First bloom': 1182 GDD₃₂

Common Chokecherry

'Bud break': 809 GDD₃₂, 'Flower buds visible': 1102 GDD₃₂, 'Leaf emergence': 1135 GDD₃₂, 'First bloom': 1560 GDD₃₂, 'Fall color / leaf senescence': 3324 GDD₃₂

'Bud break': 1187 GDD₃₂, 'Leaf emergence': 1345 GDD₃₂

'Bud break': 716 GDD₃₂, 'First bloom': 1302 GDD₃₂

Common Ninebark

'First bloom': 1697 GDD₃₂, 'Full bloom': 1932 GDD₃₂

Common Pawpaw Custard Apple

'Fall color / leaf senescence': 1392 GDD₃₂, 'Flower buds visible': 1606 GDD₃₂, 'Bud break': 1614 GDD₃₂, 'First bloom': 1614 GDD₃₂, 'Leaf emergence': 1614 GDD₃₂

'Bud break': 999 GDD₃₂, 'Flower buds visible': 999 GDD₃₂, 'First bloom': 1117 GDD₃₂, 'Leaf emergence': 1144 GDD₃₂

Common Persimmon

Bud break: 1342 GDD₃₂, Leaf emergence: 1642 GDD₃₂

Common Sassafras

Bloom start: 708 GDD₃₂, Full bloom: 800 GDD₃₂

Common Smoketree Smokebush

'First bloom': 2450 GDD₃₂, 'Full bloom': 2735 GDD₃₂

Common Snowberry

'Bud break': 644 GDD₃₂, 'Leaf emergence': 808 GDD₃₂, 'Flower buds visible': 1854 GDD₃₂, 'First bloom': 2228 GDD₃₂, 'Fall color / leaf senescence': 3222 GDD₃₂

Common Witchhazel

'First bloom': 281 GDD₃₂, 'Flower buds visible': 394 GDD₃₂, 'Bud break': 910 GDD₃₂, 'Leaf emergence': 1049 GDD₃₂

Compact Garland Spirea

Full bloom: 1377 GDD₃₂, Beginning of flowering: 1391 GDD₃₂

Coralburst Crabapple

Beginning of flowering: 977 GDD₃₂, Full bloom: 1184 GDD₃₂

Corneliancherry Dogwood

Bloom start: 233 GDD₃₂, Full bloom: 715 GDD₃₂

Bloom start: 1454 GDD₃₂, Full bloom: 1702 GDD₃₂, Fall color / leaf senescence: 606 GDD₃₂, Bud break: 810 GDD₃₂, Leaf emergence: 1016 GDD₃₂

Crape myrtle Natchez

Beginning of flowering: 6303 GDD₃₂, Full bloom: 7328 GDD₃₂

Creeping Mahonia

'Flower buds visible': 846 GDD₃₂, 'First bloom': 1135 GDD₃₂, 'Bud break': 1238 GDD₃₂

Crimsoneyed rosemallow

Beginning of flowering: 6899 GDD₃₂, Full bloom: 7571 GDD₃₂

Cutleaf Red Alder

'First bloom': 844 GDD₃₂, 'Bud break': 854 GDD₃₂, 'Full bloom': 886 GDD₃₂, 'Flower buds visible': 1031 GDD₃₂, 'Leaf emergence': 1049 GDD₃₂, 'Fall color / leaf senescence': 2063 GDD₃₂

'Bud break': 847 GDD₃₂, 'Flower buds visible': 983 GDD₃₂, 'Leaf emergence': 995 GDD₃₂, 'First bloom': 1305 GDD₃₂

Donald Wyman Crabapple

Beginning of flowering: 1143 GDD₃₂, Full bloom: 1130 GDD₃₂

Doublefile Viburnum

'First bloom': 1229 GDD₃₂, 'Full bloom': 1490 GDD₃₂

'First bloom': 982 GDD₃₂, 'Flower buds visible': 982 GDD₃₂, 'Bud break': 1026 GDD₃₂, 'Leaf emergence': 1234 GDD₃₂

Beginning of flowering: 1170 GDD₃₂

Dwarf Fothergilla

Bloom start: 1193 GDD₃₂, Full bloom: 1463 GDD₃₂

'First bloom': 838 GDD₃₂, 'Full bloom': 973 GDD₃₂

'Bud break': 1474 GDD₃₂, 'First bloom': 1763 GDD₃₂, 'Flower buds visible': 1763 GDD₃₂

Evergreen Blackberry Cutleaf Blackberry

'Bud break': 844 GDD₃₂, 'First bloom': 2863 GDD₃₂

Fernald's shadbush

Full bloom: 945 GDD₃₂

'First bloom': 1490 GDD₃₂

Flowering Dogwood

'Bud break': 1010 GDD₃₂, 'Flower buds visible': 1061 GDD₃₂, 'First bloom': 1128 GDD₃₂, 'Leaf emergence': 1128 GDD₃₂

Flowering Quince

'First bloom': 703 GDD₃₂, 'Full bloom': 870 GDD₃₂

'Full bloom': 923 GDD₃₂, 'First bloom': 1391 GDD₃₂

'Bud break': 740 GDD₃₂, 'Leaf emergence': 879 GDD₃₂, 'Flower buds visible': 940 GDD₃₂

Golden Raintree

Bloom start: 3245 GDD₃₂, Full bloom: 3987 GDD₃₂

'First bloom': 1200 GDD₃₂, 'Full bloom': 1370 GDD₃₂

Green Manzanita Greenleaf Manzanita

'Bud break': 840 GDD₃₂, 'First bloom': 840 GDD₃₂, 'Flower buds visible': 840 GDD₃₂

'First bloom': 754 GDD₃₂, 'Full bloom': 838 GDD₃₂

Highbush Blueberry

'Bud break': 1068 GDD₃₂, 'Flower buds visible': 1272 GDD₃₂, 'Leaf emergence': 1538 GDD₃₂

Hollow Joe pye weed

Beginning of flowering: 6983 GDD₃₂

Bloom start: 1794 GDD₃₂, Full bloom: 2269 GDD₃₂

Beginning of flowering: 1130 GDD₃₂

'Bud break': 340 GDD₃₂, 'Flower buds visible': 514 GDD₃₂, 'First bloom': 572 GDD₃₂, 'Leaf emergence': 592 GDD₃₂, 'Fall color / leaf senescence': 2307 GDD₃₂

Japanese Camellia

'First bloom': 508 GDD₃₂, 'Full bloom': 770 GDD₃₂

Japanese Flowering Cherry

'Flower buds visible': 807 GDD₃₂, 'First bloom': 847 GDD₃₂, 'Bud break': 1126 GDD₃₂, 'Leaf emergence': 1224 GDD₃₂

Japanese Flowering Crabapple

Bloom start: 1096 GDD₃₂, Full bloom: 1143 GDD₃₂

Japanese Kerria Japanese Rose

'First bloom': 1008 GDD₃₂, 'Full bloom': 1229 GDD₃₂

Japanese Pagodatree Scholar-tree

'First bloom': 4200 GDD₃₂, 'Full bloom': 4700 GDD₃₂

Japanese Pieris

'First bloom': 580 GDD₃₂, 'Full bloom': 798 GDD₃₂

Japanese Snowbell

'First bloom': 1932 GDD₃₂, 'Full bloom': 2336 GDD₃₂

Japanese Stewartia

'First bloom': 2878 GDD₃₂, 'Full bloom': 3498 GDD₃₂

Japanese Tree Lilac

'First bloom': 2167 GDD₃₂, 'Full bloom': 2573 GDD₃₂

Koreanspice Viburnum

Beginning of flowering: 876 GDD₃₂

Beginning of flowering: 2253 GDD₃₂

Lewis' Mock Orange

'Bud break': 778 GDD₃₂, 'Leaf emergence': 983 GDD₃₂, 'Flower buds visible': 1585 GDD₃₂, 'First bloom': 2474 GDD₃₂

Little Wood Rose

'Bud break': 591 GDD₃₂, 'Leaf emergence': 1471 GDD₃₂

Littleleaf Linden

Bloom start: 3148 GDD₃₂, Full bloom: 3027 GDD₃₂

Longleaf Mahonia Cascade Mahonia

'Flower buds visible': 926 GDD₃₂, 'First bloom': 1144 GDD₃₂, 'Bud break': 1242 GDD₃₂

Beginning of flowering: 679 GDD₃₂, Full bloom: 899 GDD₃₂

Beginning of flowering: 1188 GDD₃₂

Monterey Ceanothus

'First bloom': 1334 GDD₃₂, 'Flower buds visible': 1334 GDD₃₂

Mountain Laurel

'First bloom': 1932 GDD₃₂, 'Full bloom': 2573 GDD₃₂

Mountain pieris

Full bloom: 1143 GDD₃₂

Multiflora Rose

Beginning of flowering: 2082 GDD₃₂

Nantucket serviceberry

Full bloom: 992 GDD₃₂

'First bloom': 1490 GDD₃₂, 'Full bloom': 1815 GDD₃₂

'Bud break': 886 GDD₃₂, 'Leaf emergence': 1128 GDD₃₂, 'Flower buds visible': 1937 GDD₃₂, 'First bloom': 2089 GDD₃₂

Northern Catalpa

'First bloom': 2336 GDD₃₂, 'Full bloom': 2735 GDD₃₂

Northern Lights Forsythia

Beginning of flowering: 423 GDD₃₂, Full bloom: 686 GDD₃₂

'First bloom': 754 GDD₃₂, 'Full bloom': 825 GDD₃₂

Oakleaf Hydrangea

'First bloom': 2573 GDD₃₂

Oceanspray Creambush

'Bud break': 844 GDD₃₂, 'Leaf emergence': 953 GDD₃₂, 'Flower buds visible': 1813 GDD₃₂, 'Fall color / leaf senescence': 2499 GDD₃₂, 'First bloom': 2863 GDD₃₂

'First bloom': 1008 GDD₃₂, 'Full bloom': 1229 GDD₃₂

'Flower buds visible': 1061 GDD₃₂, 'Full bloom': 1178 GDD₃₂, 'Bud break': 1304 GDD₃₂, 'First bloom': 1330 GDD₃₂, 'Leaf emergence': 1594 GDD₃₂, 'Fall color / leaf senescence': 2760 GDD₃₂

'Flower buds visible': 995 GDD₃₂, 'First bloom': 1084 GDD₃₂, 'Bud break': 1201 GDD₃₂

Oval-leaf Blueberry

'Bud break': 607 GDD₃₂, 'Leaf emergence': 780 GDD₃₂, 'First bloom': 935 GDD₃₂

'First bloom': 2860 GDD₃₂

P.J.M. Rhododendron

'First bloom': 853 GDD₃₂, 'Full bloom': 1032 GDD₃₂

Pacific Dogwood

'Bud break': 980 GDD₃₂, 'Leaf emergence': 1142 GDD₃₂, 'Flower buds visible': 1154 GDD₃₂, 'First bloom': 1263 GDD₃₂

Pacific Madrone

'Flower buds visible': 926 GDD₃₂, 'Bud break': 1327 GDD₃₂, 'First bloom': 1327 GDD₃₂

Pacific Rhododendron

'Flower buds visible': 1025 GDD₃₂, 'Bud break': 1773 GDD₃₂, 'First bloom': 1906 GDD₃₂

'First bloom': 1270 GDD₃₂, 'Full bloom': 1490 GDD₃₂

Panicle Hydrangea

'First bloom': 2735 GDD₃₂

'Bud break': 1042 GDD₃₂, 'Flower buds visible': 1042 GDD₃₂, 'Leaf emergence': 1042 GDD₃₂

'First bloom': 1080 GDD₃₂, 'Full bloom': 1364 GDD₃₂

Beginning of flowering: 1080 GDD₃₂, Full bloom: 1364 GDD₃₂

Persian speedwell

Beginning of flowering: 120 GDD₃₂

Piggyback Plant

'Flower buds visible': 1276 GDD₃₂

Pinxterbloom azalea

Full bloom: 1620 GDD₃₂

Possumhaw Smooth Witherod Northern Wild Raisin

'Full bloom': 3095 GDD₃₂

Prunus virginiana

'First bloom': 838 GDD₃₂, 'Full bloom': 933 GDD₃₂

Purple deadnettle

Beginning of flowering: 380 GDD₃₂

'First bloom': 902 GDD₃₂, 'Flower buds visible': 902 GDD₃₂, 'Bud break': 1129 GDD₃₂, 'Leaf emergence': 1417 GDD₃₂, 'Fall color / leaf senescence': 2294 GDD₃₂

'Bud break': 912 GDD₃₂, 'Leaf emergence': 912 GDD₃₂, 'Flower buds visible': 1072 GDD₃₂

'First bloom': 973 GDD₃₂, 'Full bloom': 1229 GDD₃₂

'First bloom': 1100 GDD₃₂, 'Full bloom': 1229 GDD₃₂

'Bud break': 603 GDD₃₂, 'Leaf emergence': 784 GDD₃₂, 'Flower buds visible': 926 GDD₃₂, 'First bloom': 1200 GDD₃₂, 'Fall color / leaf senescence': 3112 GDD₃₂

Red Flowering Horsechestnut

'First bloom': 1368 GDD₃₂, 'Full bloom': 1672 GDD₃₂

Red Horsechestnut

Beginning of flowering: 1562 GDD₃₂, Full bloom: 1809 GDD₃₂

Red Huckleberry

'Bud break': 773 GDD₃₂, 'Leaf emergence': 932 GDD₃₂, 'Flower buds visible': 1031 GDD₃₂, 'First bloom': 1142 GDD₃₂, 'Fall color / leaf senescence': 1737 GDD₃₂

'Flower buds visible': 1221 GDD₃₂, 'Fall color / leaf senescence': 1228 GDD₃₂, 'Bud break': 1242 GDD₃₂, 'Leaf emergence': 1364 GDD₃₂

Red-flowering Currant

'Bud break': 524 GDD₃₂, 'Flower buds visible': 626 GDD₃₂, 'Leaf emergence': 667 GDD₃₂, 'First bloom': 756 GDD₃₂, 'Fall color / leaf senescence': 2346 GDD₃₂

'Flower buds visible': 1428 GDD₃₂

Beginning of flowering: 3976 GDD₃₂

'Bud break': 730 GDD₃₂, 'Fall color / leaf senescence': 730 GDD₃₂, 'Leaf emergence': 730 GDD₃₂

Rosebay Rhododendron

Beginning of flowering: 2828 GDD₃₂

Leaf emergence: 770 GDD₃₂

'Bud break': 1469 GDD₃₂, 'Flower buds visible': 1471 GDD₃₂, 'First bloom': 2154 GDD₃₂

'Bud break': 719 GDD₃₂, 'Leaf emergence': 935 GDD₃₂, 'Flower buds visible': 1020 GDD₃₂, 'First bloom': 1054 GDD₃₂, 'Fall color / leaf senescence': 1284 GDD₃₂

'First bloom': 754 GDD₃₂, 'Full bloom': 825 GDD₃₂

Sargent Crabapple

Bloom start: 1035 GDD₃₂, Full bloom: 1341 GDD₃₂

Saucer Magnolia

Beginning of flowering: 701 GDD₃₂, Full bloom: 1009 GDD₃₂

'Fall color / leaf senescence': 1018 GDD₃₂, 'Bud break': 1084 GDD₃₂, 'Flower buds visible': 1304 GDD₃₂, 'Leaf emergence': 1337 GDD₃₂, 'First bloom': 1539 GDD₃₂

Scouler's Willow

'Flower buds visible': 757 GDD₃₂, 'Bud break': 894 GDD₃₂, 'Leaf emergence': 1221 GDD₃₂

Seven Sons Flower

'First bloom': 4870 GDD₃₂, 'Full bloom': 5450 GDD₃₂

'First bloom': 798 GDD₃₂

Showy Forsythia

'First bloom': 423 GDD₃₂, 'Full bloom': 686 GDD₃₂

Shrubby Cinquefoil

'First bloom': 1490 GDD₃₂

'First bloom': 3165 GDD₃₂, 'Full bloom': 3665 GDD₃₂

'Bud break': 1476 GDD₃₂, 'Leaf emergence': 1496 GDD₃₂

Slender Deutzia

'First bloom': 1229 GDD₃₂

Bloom start: 1775 GDD₃₂, Inflorescence emergence: 3005 GDD₃₂

Snowdrift Crabapple

'First bloom': 870 GDD₃₂, 'Full bloom': 1008 GDD₃₂

Southern Catalpa

'First bloom': 2878 GDD₃₂, 'Full bloom': 3248 GDD₃₂

'Bud break': 1353 GDD₃₂, 'Leaf emergence': 1353 GDD₃₂, 'First bloom': 1863 GDD₃₂, 'Flower buds visible': 1863 GDD₃₂, 'Full bloom': 1863 GDD₃₂

'First bloom': 624 GDD₃₂, 'Full bloom': 770 GDD₃₂

Spring Snow Crabapple

Beginning of flowering: 899 GDD₃₂, Full bloom: 941 GDD₃₂

Bloom start: 628 GDD₃₂, Full bloom: 876 GDD₃₂

Beginning of flowering: 4228 GDD₃₂

Sweet Mockorange

Beginning of flowering: 1832 GDD₃₂, Full bloom: 2438 GDD₃₂

Sweetbay Magnolia

'First bloom': 1932 GDD₃₂

'Flower buds visible': 1272 GDD₃₂

Syringa pubescens

'First bloom': 1604 GDD₃₂, 'Full bloom': 1892 GDD₃₂

Tatarian Honeysuckle

'First bloom': 933 GDD₃₂, 'Full bloom': 1229 GDD₃₂

Thimbleberry Western Thimbleberry

'Bud break': 817 GDD₃₂, 'Leaf emergence': 1305 GDD₃₂, 'Flower buds visible': 1490 GDD₃₂, 'First bloom': 1855 GDD₃₂

'First bloom': 380 GDD₃₂, 'Full bloom': 708 GDD₃₂

Trailing Blackberry Western Blackberry California Blackberry Dewberry

'Bud break': 842 GDD₃₂, 'Leaf emergence': 953 GDD₃₂, 'Fall color / leaf senescence': 1173 GDD₃₂, 'Flower buds visible': 1405 GDD₃₂, 'First bloom': 1612 GDD₃₂

Bloom start: 1862 GDD₃₂, Full bloom: 1934 GDD₃₂

'Bud break': 521 GDD₃₂, 'Leaf emergence': 851 GDD₃₂, 'First bloom': 1128 GDD₃₂, 'Flower buds visible': 1144 GDD₃₂

Umbrella Magnolia Umbrella Tree

Bloom start: 1368 GDD₃₂, Full bloom: 1824 GDD₃₂

'Bud break': 983 GDD₃₂, 'Flower buds visible': 1296 GDD₃₂, 'Leaf emergence': 1319 GDD₃₂, 'First bloom': 1347 GDD₃₂, 'Full bloom': 1481 GDD₃₂, 'Fall color / leaf senescence': 2310 GDD₃₂

Virginia spiderwort

Beginning of flowering: 1877 GDD₃₂, Full bloom: 2630 GDD₃₂

Washington Hawthorn

Bloom start: 2413 GDD₃₂, Full bloom: 2485 GDD₃₂

Wayfaringtree Viburnum

'First bloom': 933 GDD₃₂, 'Full bloom': 1100 GDD₃₂

Beginning of flowering: 1422 GDD₃₂

'First bloom': 557 GDD₃₂, 'Flower buds visible': 710 GDD₃₂, 'Full bloom': 800 GDD₃₂, 'Bud break': 1097 GDD₃₂, 'Leaf emergence': 1161 GDD₃₂, 'Fall color / leaf senescence': 3008 GDD₃₂

Western Ninebark Pacific Ninebark

'Bud break': 661 GDD₃₂, 'Leaf emergence': 859 GDD₃₂, 'Fall color / leaf senescence': 889 GDD₃₂, 'Flower buds visible': 1334 GDD₃₂, 'First bloom': 1956 GDD₃₂

Western Serviceberry

'Bud break': 886 GDD₃₂, 'Leaf emergence': 1178 GDD₃₂, 'Flower buds visible': 1215 GDD₃₂, 'First bloom': 1428 GDD₃₂

Bloom start: 1102 GDD₃₂, Full bloom: 1080 GDD₃₂

White enkianthus

Full bloom: 918 GDD₃₂

White Flowered Redbud

'Flower buds visible': 835 GDD₃₂, 'First bloom': 1249 GDD₃₂, 'Bud break': 1313 GDD₃₂, 'Leaf emergence': 1554 GDD₃₂, 'Fall color / leaf senescence': 1750 GDD₃₂

White Fringetree

'First bloom': 1490 GDD₃₂, 'Full bloom': 1697 GDD₃₂

Winterberrry Winterberry Holly

Bloom start: 2700 GDD₃₂, Full bloom: 3050 GDD₃₂

Yellow flag iris

Beginning of flowering: 2284 GDD₃₂