Native perennials you can trim

	A	B	C	D	E	F
1	Common name	Scientific name	Chelsea Cut	Staggered cuts	Cut back after blooming to promote flush of new foliage	Deadheading to encourage reblooming

2	Yarrow	Achellia millefolium - Yarrow			x
3	Eastern Red Columbine	Aquilegia canadensis			x
4	Common Milkweed	Ascplepias syriaca			Trim at least by half in June
5	New England Aster	Aster novi-belgii	Memorial Day/Early June	x
6	Aromatic Aster	Aster oblongifolium	Before late July	x
7	Maryland goldenaster	Chrysopis mariana				x
8	Coreopsis	Coreopsis species	By the end of June	x	x
9	Robin's plantain	Erigeron pulchellus				x
10	Hollow Joe Pye Weed	Eutrochium fistulosum	By the end of June
11	Common Boneset	Eupatorium perfoliatum	Through July
12	Sneezeweed	Helenium autumnale	By early June		x (may rebloom in later fall)
13	native sunflowers	Helianthus species	By late May/early June			x
14	Heuchera species	Heuchera				x
15	Oxeye Sunflower	Heliopsis helianthoides	By late May/early June		x
16	Cardinal Flower	Lobelia cardinalis	By late June
17	Great Blue Lobelia	Lobelia siphilitica	By late June
18	Bee Balm	Monarda didyma	May	x	x (may rebloom)
19	Wild Bergamot	Monarda fistulosa	May	x	x (may rebloom)
20	Narrowleaf Evening Primrose	Oenothera fruticosa			x (may rebloom)
21	Switch Grass	Panicum virgatum	Mow or prune in June or July
22	Beardtongue	Penstemon species			x
23	Summer Phlox	Phlox paniculata	Late May or early June (but can reduce flower power)	x		x
24	Jacob's Ladder	Polemonium reptans			x
25	Obedient Plant	Physostegia virginiana	Through early July. May diminish the flowering
26	Mountain Mint	Pycnanethum species	By late June
27	Brown-eyed Susan and other Rudbeckias	Rudbeckia species	Through July		x
28	Wild petunia	Ruellia humilis				x
29	Skullcap	Scutellaria species	By late June
30	Maryland Senna	Senna marilandica	By late May/early June
31	Blue-eyed Grass	Sisyrinchium species			x
32	New England Aster	Symphyotrichum novi-belgii	Memorial Day/Early June	x
33	Aromatic Aster	Symphyotrichum oblongifolium	Before late July	x
34	Other aster species	Symphyotrichum, Eurybia	x
35	Goldenrods	Solidago and Euthamia species	By late June
36	Meadowrue	Thalictrium species			x
37	Foamflower	Tiarella cordifolia				x
38	Spiderwort	Tradescantia species			x
39	Vervain	Verbena species	By late June
40	New York Ironweed	Vernonia novaboracensis	Either cut down to the ground when it reaches 2 feet, or by 1-2 feet when they are 3-4 feet tall, by mid-July.
41	Culver's Root	Veronicastrum virginicum	May
42	Golden Alexander	Zizia aurea			x
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100