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CULTURAL
DIARY
2018
John Hamilton
National Begonia Society Cut Bloom
Champion 2008 2002
British Begonia Champion 2012 2009 2008 2004
SBS Pot Plant Champion 2012 |

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July part 1
The start of July saw the continuation of the hot weather and with it a
new problem Caterpillars. Another spray to be added to the programme
this time a biological one. It pays to take some time to study your
plants and potential problems can be overcome before they become a
disaster. At this time of year all my vents and doors are left open as
the two essentials for good begonias are fresh air and water. This does
allow moths to enter but it is a risk I am willing to take as the
benefits outweigh the problems. The hot weather is unusual for this part
of the country and three weeks of temperatures over thirty degrees had
to be overcome. My solution is to have a sunken path that can be filled
with water. The evaporation helps in two ways firstly to reduce the
temperature (small physics lesson can’t resist water has a high latent
heat of evaporation and uses a lot of heat energy for this process).
Secondly the higher humidity reduces stress on plants.
The first two weeks of the month have been a busy time with plants
receiving their last foliar feed and are now being liquid fed at every
watering with an occasional flushing of the compost with plain water.
Due to the sunshine plants have grown quite short jointed and the
foliage is quite hard and as a result the first stage of the feeding
programme was a high nitrogen feed consisting of equal parts calcium
nitrate and mono ammonium phosphate at a rate of a teaspoon of each to a
gallon of water. I mix 50 gallons of feed at a time as I have found
this is much quicker and in warm weather is used almost daily. As the
plants have now filled the pot with root additional feed is required and
up until the buds are showing colour they are given a balanced feed.
As soon as the high nitrogen feed had softened the leaves the next stage
was to start to shape the plants into form that will allow all the
flowers to be eventually displayed. overall, I grow plants forward
facing with one exception an all-round plant that is shown at our local
village show. The difference being that this is not staged against a
tent wall and needs to be able to be viewed all the way around.
This is a slow process with shoots being eased into position and leaves
dressed to allow the flowers to be seen. After about a week the entire
process is repeated as trying to do it in one go can cause shoots to
break off and leave a hole in the plant. The eventual aim is to make
sure that each bloom has room to develop and be correctly displayed.
As the plants are to be used for Dundee Flower Show and need to be ready
for the 31st. of August the stopping date is the 19th of July. My timing
process is simple with every plant stopped on the one day. Varieties
such as Roy Hartley and Sweet Dreams have the larger buds allowed to
develop whereas the others are taken on smaller buds. Timing is a
personal thing and depends on your location. I do however err on the
side of a smaller bud with pot plants. The reason behind this is
transportation. Younger fresher flowers are much easier to take to the
show. Each shoot is stopped i.e. the growing point removed and two buds
allowed to develop. This does shorten the flowering period but makes
final arrangement of blooms easier and has the additional benefit of
making the flowers grow slightly larger.
Some plants have been discarded and will be grown on for stock this
allows more space in greenhouse. Next years stock is now growing well
in the cold frame and the tops and side shoots have been removed to
encourage basal shoots to form. The cuttings will now be given a weekly
feed of a balanced fertiliser as they will have used the feeding up in
the 5-inch pots in which they are being grown.
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water cooling greenhouse |

plant ready for initial staking |

pot plants |

plant staked
1 week later |

stakes added & shoots adjusted |

biological caterpillar control |

general views of greenhouse |

discarded plants and feeding barrel |

cuttings in cold frame |

rear view of stakes |
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British Begonia Champion 12 Cut Blooms 2012 |

Scottish Championship 9 Pots 2012 |
John's
Open Days
2016
2014
2013 |
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