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S-WEEDS, COMMON NAMES, ALPHABETICALLY, O-S:
Oak OCT
23 JAN 12
MAY 20 SEP
15
Oak-leaved Goosefoot NOV
09 AUG 22 JUN
05 JUL 08
Oat AUG
11 JUL 08
FEB 14
Oil-seed Rape JAN
28 JUN 19 DEC
17 APR 11
Opium Poppy NOV
10 OCT 10
Orange Foxtail JUL
21
Orange-eye Butterflybush AUG
15 OCT 16
Oregano DEC
03 APR 10
Orpine AUG
04 JAN 03 APR
16
Oval Sedge JUN
10
Oxeye Daisy MAR
28 JUN 05 SEP
28 FEB 05
DEC 25
Pale Persicaria JUN
09 AUG 02 JUL
30
Pale Red Persicaria JUN
13 JUL 30
Pale Toadflax JUL
14
Pansy AUG
03 OCT 18
Peach OCT
02
Perennial Cornflower JUN
10
Perennial Rye-grass NOV
17 FEB 11
JUN 24 JUL
16 JAN 25
Perforate St John's-wort NOV
14 FEB 07
MAY 04 JUL
07 DEC 25
Petty Spurge OCT
13 JUL 03 DEC
20 JUN 01
Petunia AUG
28
Pineapple Weed NOV
01 JAN 20
MAY 17 SEP
29 MAR 15
Pink Hedge Bindweed JUL
17 OCT 31
Plains Coreopsis NOV
07 FEB 01
JUN 21
Pot Marigold JUL
12 SEP 24
NOV 10 JUN
29 AUG 03
Prickly Lettuce DEC
29 JUL 13
AUG 24 NOV
01 FEB 15
Prickly Sowthistle OCT
12 DEC 31
AUG 03 JAN
05
Procumbent Pearlwort OCT
14 JAN 07
APR 03 JUN
04 MAR 11
Procumbent Yellow-sorrel AUG
26 MAY 28
Prostrate Knotgrass OCT
31 JAN 19
FEB 25 MAY
08 MAY 22
Pumpkin OCT
24 SEP 04
Purple Loosestrife JUN
24 OCT 11 DEC
15 JAN 29
Purple Viper's Bugloss JUL
25 SEP 01
Purple-leaf False Shamrock AUG
26 SEP 26
Purslane Speedwell
Pyramidal bugle MAY
09 SEP 07 JAN
20 APR 29
Radish JUL
23
Rambler Rose JUN
19 NOV 09
Raspberry MAY
11 JUL 08 OCT
28 FEB 26
JAN 09
Rat's-tail Fescue JUL
04 AUG 10
Red Bartsia FEB
13 MAY 27 JUL
20 SEP 30
NOV 29
Red Campion JUN
02 AUG 17
Red Clover SEP
04 NOV 21
FEB 28 MAY
31 JUL 29
Red Dead-nettle JUL
15 OCT 07
DEC 12
Red Fescue JUN
27 JUL 11
Red Goosefoot SEP
23 DEC 11
MAR 17 JUL
21
Red Spurry SEP
09 MAY 21 AUG
19 NOV 23
JAN 18
Reed Canary-grass FEB
06 JUN 28 AUG
09 NOV 12
Ribwort MAY
31 SEP 11
JAN 12
Rigid Hawkweeds AUG
02 NOV 21 FEB
08 APR 02
Rocky Mountain Garland AUG
25 NOV 06
Rough Meadow-grass NOV
19 FEB 12
JUN 22
Round-fruited Rush OCT
04 DEC 24
FEB 14 JUN
12 MAR 08
Rowan AUG
19 OCT 23 MAR
18 APR 24
Russian Cinquefoil SEP
20 NOV 14 MAR
21 MAY 25 JUN
20
Russian Comfrey AUG
15 NOV 13
APR 18 JAN
15 MAR 20
Rye JUL
08
Sand Lucerne AUG
07 SEP 11
Scented Mayweed SEP
17 MAR 04
MAY 26 AUG
26 DEC 05
Scentless Mayweed SEP
17 DEC 05
JAN 03 MAR
05 AUG 26
Scotch broom JUN
26 FEB 04
Scots Pine NOV
12 MAR 24
Sea Aster SEP
13
Sea Buckthorn JAN
21 MAY 06
Sea Clubrush JUL
11 DEC 04
MAR 21
Sea Lavender APR
02 JUL 07
JAN 14 MAR
17 MAY 07
Sea Plantain JUL
01 SEP 11
JAN 13 JUN
17 FEB 17
Shaggy Soldier OCT
20 AUG 25
Sheep's Fescue JUL
13 MAY 19 AUG
21 JAN 26
Sheep's Sorrel DEC
16 MAR 09
APR 27 JUL
16 JAN 11
Shepherd's purse SEP
30 DEC 23
FEB 18 MAR
18 APR 08
Short-fruited Willowherb AUG
09 SEP 29 MAY
23
Shrubby Cinquefoil NOV
20 AUG 09
Siberian Pea-tree NOV
11
Siberian Squill APR
04 MAY 12
Silver Birch JUL
14
Silverweed APR
30 JUN 04 SEP
26 MAR 30
DEC 24
Skullcap JUL
22
Slender Foxtail AUG
10 SEP 25
Small Bugloss AUG
01 SEP 04
JUN 28
Small Cranesbill SEP
22 DEC 10
MAR 11 MAY
05 NOV 27
Small Nettle NOV
17 MAY 15 OCT
29
Small Toadflax JUL
14
Small Water-pepper JUL
20
Small-flowered Balsam JUN
24 OCT 28 MAY
02
Small-flowered Wintercress MAY
21 JUN 25 MAR
29 APR 28
Small-leaved Lime MAY
20 OCT 10
APR 15
Smooth Meadow-grass JUN
02 AUG 13 FEB
16
Smooth Tare JUN
03 SEP 20
FEB 09 AUG
11 DEC 08
Sneezewort MAY
25 JUL 29 NOV
02 JAN 09
MAR 12
Snowberry OCT
05 JUL 03
SEP 14 JAN
08
Soft Brome JUN
02 MAY 12 APR
30
Soft Rush FEB
26 JUN 12 JAN
06 AUG 18 DEC
19
Solid-rooted Fumewort APR
27
Sour Cherry AUG
29
Spear Thistle OCT
26 JAN 14
FEB 23 MAY
19 JUN 16
Spear-leaved Orache JUN
18 SEP 02 DEC
13 NOV 16 FEB
23
Spider Flower OCT
23 NOV 10
OCT 01
Spiked Sedge JUN
05 APR 13
Spreading Cotoneaster NOV
17 MAY 03
Spring Crocus MAR
28
Staghorn Sumac OCT
12 MAY 16 NOV
09
Star Sedge JUL
01 JUN 12
Sticky groundsel SEP
21 DEC 09
MAY 24 JUL
04 OCT 27
Sticky Mouse-ear DEC
07 SEP 19 JAN
27
Stinging Nettle SEP
07 NOV 24
MAR 02 APR
12 JAN 29
Stinking Chamomile OCT
30 JAN 11
MAR 22 MAY
13 AUG 23
Sulphur Cinquefoil
Sun Spurge AUG
01 NOV 17
JAN 07 MAR
08
Sunflower MAY
03 JUL 02 AUG
28 FEB 14 APR
25
Swamp Meadow-grass NOV
18 SEP 23
AUG 08
Swedish Goosefoot DEC
12 MAR 26
SEP 16 JUL
06 NOV 30
Sweet Bramble JUL
06 AUG 11
Sweet Vernal-grass MAY
22 JUN 14
Sweet Violet MAR
14 APR 21
Sweet-briar JUL
14 OCT 16
APR 22 SEP
14 JUN 29
Sycamore SEP
15 NOV 18 FEB
11 APR 14 MAY
19
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