Its time once more to think about our tomatoes, its amazing how many people grow a few of their own if they grow nothing else. Below is a watering table developed around 2004 by the then Fairfield Experimental Station in Lancashire. First heard of it at a garden club talk eight years ago, have found it quite reliable.
WEATHER PINTS LITRES
Very dull dark cloudy most of the day ¼ – ½ 0.14 0,28
Dull cloud overcast most of the day ½ – ¾ 0.28 -0.42
Sunny cloudy with bright periods 1 ¼ – 1 ½ 0.71 -0.85
Sunny only an odd cloud 2 -2 ¼ 1.10 -1.20
Very sunny clear sky 3-3 ¼ 1.50-1.80
Have found this quite reliable, also at the same time I came across some notes I made during a Charles Maisey talk on growing tomatoes. Charles is one of the top tomato growers in the country, he advised Joe Swift a few years back when Joe did the TV program and entered tomatoes and carrots at Chelsea. He answered a question Beanstew asked a couple of days ago regarding Calcified sea weed, instead of folier spraying with Calcium Carbonate he worked just a tea spoon of Calcified seaweed into the planting hole