GARDEN FERN EMERGENCE SUMMARY, by week

 

1993

94

95

96

97

98

99

2000

01

02

03

04

05

06

07

08

09

10

11

%

%/ day

07

10

3-

 

 

 

 

 

 

 

1

 

2

 

 

 

 

 

 

0

1

0

4

.5

.1

 

0.3

3D

 

1

1

1

1

 

1

5

 

1

1

1

 

 

 

 

0

5

0

18

2.4

0.3

 

1.7

3E

 

 

 

 

2

5

 

6

 

 

 

1

 

1

 

 

1

3

1

20

2.6

0.9

 

2.3

4A

2

4

6

4

3

10

10

10

3

3

3

1

9

6

2

1

8

15

6

106

14.0

2.0

.6

5.0

4B

4

4

2

1

3

10

13

11

10

13

4

6

5

9

1

12

7

8

9

132

17.5

2.5

.3

2.7

4C

13

10

8

8

5

8

8

6

5

19

8

15

14

15

3

6

6

3

8

168

22.3

3.2

1

1.0

4D

3

5

6

10

12

2

5

3

20

2

16

11

12

10

20

12

12

3

11

175

23.2

3.3

6.3

1.0

4E

 

 

1

 

1

 

3

 

 

1

3

3

2

0

3

2

2

1

1

23

3.0

1.5

3.3

1.2

5A

1

0

1

2

2

1

2

1

5

2

8

4

2

4

9

3

2

2

3

54

7.2

1.0

2.9

0.7

5B

 

 

1

1

2

 

2

2

2

1

1

2

1

 

4

3

1

1

0

24

3.2

0.5

1.3

0.3

5C

 

 

 

 

 

 

 

 

1

 

2

3

0

1

0

2

1

0

3

13

1.7

0.2

 

 

5D

 

 

1

 

 

 

1

 

1

 

2

 

0

 

1

1

1

0

1

9

1.2

0.2

.3

 

5E

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

0

0

0

0

0

0

0

 

 

6A

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

0

1

1

0

3

0.4

.1

 

0.3

6+

 

 

 

 

 

1

 

 

 

1

 

 

1

1

2

 

0

 

 

6

0.8

0

 

 

23

24

27

27

31

37

45

45

47

46

48

47

46

47

45

42

42

43

43

755

100

 

 

 

+2

 

The table shows the week of emergence for fern taxa each year, e. g. 5B is the second week of May.

Emergence defined as bottom of 2 fiddlehead curls clearing the ground, or one frond open. Allston (Boston) MA USA zone 6B