GARDEN FERN EMERGENCE SUMMARY, by week

 

 

1993

‘94

‘95

‘96

‘97

‘98

‘99

2000

‘01

‘02

‘03

‘04

'05

'06

‘07

‘08

%

%/day

‘07

3-

 

 

 

 

 

 

 

1

 

2

 

 

 

 

 

 

3

.5

 

 

3D

 

1

1

1

1

 

1

5

 

1

1

1

 

 

 

 

13

2.1

0.3

 

3E

 

 

 

 

2

5

 

6

 

 

 

1

 

1

 

 

15

2.4

0.8

 

4A

2

4

6

4

3

10

10

10

3

3

3

1

9

6

2

1

77

12.3

1.8

.6

4B

4

4

2

1

3

10

13

11

10

13

4

6

5

9

1

12

108

17.2

2.5

.3

4C

13

10

8

8

5

8

8

6

5

19

8

15

14

15

3

6

151

24.1

3.4

1

4D

3

5

6

10

12

2

5

3

20

2

16

11

12

10

20

12

149

23.8

3.4

6.3

4E

 

 

1

 

1

 

3

 

 

1

3

3

2

0

3

2

19

3.0

1.5

2.2

5A

1

0

1

2

2

1

2

1

5

2

8

4

2

4

9

3

47

7.5

1.0

2.9

5B

 

 

1

1

2

 

2

2

2

1

1

2

1

 

4

3

22

3.5

0.5

1.3

5C

 

 

 

 

 

 

 

 

1

 

2

3

0

1

0

2

9

1.4

0.2

 

5D

 

 

1

 

 

 

1

 

1

 

2

 

0

 

1

1

7

1.1

0.2

.3

5E

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

0

0

0

0

 

6A

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

0

1

0.2

0

 

6+

 

 

 

 

 

1

 

 

 

1

 

 

1

1

2

 

6

1.0

0

 

23

24

27

27

31

37

45

45

47

46

48

47

46

47

45

42

627

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