CHRYSANTHEMUMS in ABERDEEN

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2001 Paul Barlow


Chrysanthemum records

Nearly every grower I know keeps records of some sort. Some have the bare minimum and others like to keep a lot more. My record sheet looks like this:

NAME: YELLOW GINGERNUT

SECTION: 25b COLOUR: YELLOW

    1996 1997 1998 1999 2000
ROOT 1          
TRAYS/3" 2          
BOXES/5" 3          
STOP 4          
FINAL 5          
BUDS VISIBLE 6          
SECURED 7          
CALYX 8          
COLOUR 9          
FULL BLOOM 10          
DAYS 8/10 11          
DAYS 4/6 12          
DAYS 6/7 13          
DAYS 7/10 14          
DAYS 4/10 15          
LEAF COUNT 16          
HEIGHT 17          
LATERAL LENGTH 18          

For each variety there will eventually be several years of information on each page. I start off with rooting dates (which is the date that cuttings are inserted) and proceed through the various potting on stages. I also record the stopping date, the bud visible date and the date when blooms are ready for exhibition. I found that the date when first colour shows was, in most cases, not recordable because buds are usually bagged at calyx break.

Typically I record the date that the first plant reaches each of these stages. As most of the information on the record sheet is a date I can then use this information to calculate the number of days between the various stages of development, allowing useful comparison year on year. This is where it can get interesting.


COLLECTING THE DATA

The completed record sheet below holds information for the years 1992 to 1996. As you will see, the 1992 data relates to growing in Chester and subsequent years in Aberdeen. The first two Aberdeen years show a struggle to get to grips with timing (although admittedly 1993 was a late start), but in the latter two years a degree of consistency begins to show.

NAME: YELLOW GINGERNUT

SECTION: 25b COLOUR: YELLOW

    1992
(CHESTER)
1993
(ABERDEEN)
1994
(ABERDEEN)
1995
(ABERDEEN)
1996
(ABERDEEN)
ROOT 1 END JAN JAN 23/1 22/1 8/1
TRAYS/3" 2     12/3 20/2 10/2
BOXES/5" 3 12/4 24/4 3/4 25/3 31/3
STOP 4 12/5 12/4 3/4 26/3 14/4
FINAL 5 5/5 6/6 15/5 5/5 5/5
BUD VISIBLE 6 27/6 17/7 25/6 BY 17/6 30/6
SECURED 7 BY 14/7 25/7-3/8 BY 16/7 24/6 - 1/7 8/7
CALYX 8 26/7 20/8-30/8 30/7 - 6/8 11/7 - 19/7 1/8
COLOUR 9 n/a n/a n/a n/a n/a
FULL BLOOM 10 4/9 30/9 - 5/10 10/9 -17/9 19/8 - 26/8 8/9
DAYS 8/10 11 39 41 41 39 34
DAYS 4/6 12 44 96 83 83 77
DAYS 6/7 13 18 8 21 MAX 7 8
DAYS 7/10 14 50 66 55 56 62
DAYS 4/10 15 115 171 160 147 147
LEAF COUNT 16 n/a n/a n/a 22 24
HEIGHT 17          
LATERAL LENGTH 18          

USING THE DATA

The graph shown below provides takes the growth statistics for the medium intermediate cultivar 'Gingernut' over the last 17 years. It highlights the differences, and in some development stages similarities, between Chester and Aberdeen.

 

gnut1.gif (8308 bytes)

You might ask is this information really of any use? Well to me it is useful to be able to look back on previous years. This graph shows Gingernut as a remarkably consistent variety, hardly any variation during the years when I was growing in the Chester area. But notice the change since moving to Aberdeen.

Now that things have settled down, it basically takes one month longer to grow the plant to the point when the bud can be secured. The remaining stages of development are similar in terms of the time it takes. This is clearly why many growers in the North east of Scotland are rooting in December and stopping in March - they are putting in the extra month of growth in the pre-bud stage in order to ensure that flowering will still be during September when most of the shows take place.

So that's a brief look at my records, perhaps a bit over the top for some growers, and maybe not enough for others. Of course recording dates is only one aspect of record keeping, base dressing, lime application, liquid feeding, leaf counts are recorded as well, normally as a diary entry.

But getting back to the extra month to grow plants in NE Scotland. Why should this be so?

A brief examinantion of CLIMATE statistics is quite interesting - you can link directly to the Climate page from here.


If you would like further information or wish to comment on this publication please send your e-mail to: paul.barlow@chrysanthemums.info

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Last updated on 26 December, 2001