The Secretary's Diary
July, August & September 2003
Alan Harris (NBS Secretary 2002 - 2013) |
Alan has been growing his begonias for cut-bloom
exhibition. |
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9th. September.
If you have a
little bottom heat, about 55 - 60oF will do and an ordinary 30W
strip tube why not take some cuttings now to grow through the winter.
I did this last year and they did very well. In fact my best bloom
at Spalding was a cutting taken last September. The basel cuttings
such as this one are ideal, but keep them on the dry side until the
spring. Then pot them up and grow on as any other spring started
tuber.
My June cuttings are now being flowered in an attempt to do my own
crosses. There is a lot of pollen this year, probably caused by the plants
being stressed by the heatwave. Just goes to show that good comes
from most adversity.
This will be my last weekly update until the plants go down in
November into December and I will then run a few more weeks to cover the
process of preparing tubers for rest. In the mean time just keep watering
gently and let nature run it's course. |
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31st. August.
The weather beat
me!!
After 6 months of TLC I could cope with everything but the weather.
The picture shows a typical bloom edged by the heat and the fact that the
blooms were open too soon.
Now all the blooms
come off to give the plants chance to recover before dormancy.
They now have a couple of feeds of sulphate of potash at one spoonful to
the gallon about two weeks apart and then they are watered gently only
when they are fairly dry. |
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24th. August.
They look quite
good but will they last?
This is a shot of the greenhouse with one week to
go. I think it unlikely that they will last but Tuesday is the day for
making the decision so time will tell.
This is a picture of
my own raising Rachel Ann.
This weather seems to have suited it because
several people have told me they have had good ones this year.
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17th. August.
Attention now
moves to the main greenhouse which is housing what the weather has left of
the plants for Birmingham. They are better than the Spalding ones at
the same stage, but badly need a cool two weeks to give them any chance of
a long car ride. Time will tell.
The first single blooms are showing stamens of pollen, this one is
Rosalind. Now through to the end of September is the best time for
hybridising, so all I need now is to find a suitable female bloom. I
hope, and expect, that this will be a good year for pollen because with
all the heat the cuttings will have been stressed and this when they
produce pollen. |
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13th. August
I won!
Amazingly after all the difficulties with the heat I managed to win
the 6 cut blooms and Roy Mackey Memorial Bowl at the
show this weekend.
The heat of the last few days brought on the blooms which were stopped to
cover just this situation, and whilst they weren't the best I've ever had
they were good enough.
There must be a moral about giving up in here somewhere. |
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3rd. August.
Things look a little better than last week with the cooler weather, but
now the forecast is for another heat wave I suspect all will be ruined.
This global warming seemed a good idea to start with, now I hate it!
This is not of the greenhouse, but a basket of Orange Pendula that was
grown for the show at Bourn at the end of June and has just got better and
better since. It hangs in full sun, yet seems to love it. The more I
grow begonias the less I seem to understand them! |
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27th. July.
Things are not going well!! The hot weather of the last two
or three weeks, with temperatures if over 90oF, has taken it's
toll. The blooms are opening too quickly which means they are
unlikely to reach the size needed for showing. The picture shows
this as I would expect them to be large oyster like buds just opening
rather than what you see. Never mind there is always next year!
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20th. July.
With three weeks
to go to the East Anglian Show, I have been removing the side buds on most
of my blooms today (Saturday 19th.). These side buds usually come in pairs
and can be either female or sometimes male as well as the centre bud. They
are removed on all plants to be shown. They should be removed with great
care and without touching the main central bud, which can be marked very
easily.
This is also the stage at which I insert the collar behind the
bloom. This is just a 9" circle cut from a ceiling tile with a slot to the
middle. The collars are put on early to ensure the back petals do not fold
back and also to avoid any damage to the bloom. You can either use the
leaves for support or place a support behind the collar. The collar is
left on from now until the bloom is actually placed on the show board, but
more about that later. |
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13th. July.
Today (saturday 12th.) is 4 weeks
before the East Anglian Area show at Spalding and it is time for me to
take the buds and stop the plants. The bud selected needs, for my
greenhouse, to be as near 2" across as possible.
The pictures show before and after with the 2" bud being retained and the
larger one removed.
The plant is also stopped, leaving one leaf above the bud. The theory is
that the leaf above enables the plant to put more into the bloom. Feeding
now starts and the plants will be given ¼ strength Chempak No 4 at every
watering for the next three weeks. This is approximately every 3 days.
All I need now is for this perishing hot weather to cool down. |
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6th. July Tarsonamid
mite.
There appears to be a
major outbreak of Tarsonamid mite on begonias up and down the country. The
infection is evident on looking at the tip of the plant (picture 1) where
it will appear stunted and will have brown or black streaks on the buds
and tiny leaves. The stem (picture 2) looks corky, like apple scab. There
is no spray available to the amateur to control this pest and the best
thing is to dispose of affected stock. Systemic insecticides have no
effect, whatever the article in the Garden News claimed. For those
of you who have been lucky enough to avoid it, I strongly suggest that you
do not take cuttings or plants from anybody unless you know they are free
and were last year. This is a very serious pest. You have
been warned! I have been given an RHS document on the subject and will
write this into a more comprehensive article in the Autumn Bulletin. |
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OTHER PAGES BY ALAN HARRIS
The Secretary's Diary
Cut-blooms
The Secretary's
page on growing for exhibition.
The
Secretary's Page |
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