I'm back ! I've been out all over the world tonight (did you miss me) looking for evidence that moon planting works, but there is very little out there. My fingers have blisters from tramping about. I've tried to be fair (Aunty always is) but the only evidence is very wish washy. I’ve read the moon planting link you posted Henry and many many other sites as well and this is what I have gleaned:
The tides on the earth are mainly caused by the gravitational pull of the moon on the earth. As the only part of the earth which can easily move is the water a bulge is created on the side nearest the moon. The sun also exerts a gravitational pull on the earth but a much weaker one, pulling the water towards the sun. When the sun, earth and moon are in line the combined pull is the greatest creating a spring tide. When the earth, moon and sun are at right angles the pull is the weakest creating a neap tide.
Spring and Neap Tides The ground water is also acted upon by these gravitational pulls and rises and falls at the same time but to a lesser extent. Ocean tides rise and fall by numbers of feet as we can all observe. I can find no information about the rise and fall of ground water but one academic study I found suggests a rise and fall in the 'water table' of about 2-3 cm (not a great movement in proportion to tidal change), but it is not something which many scientists have studied.
Groundwater You may draw whatever conclusion you wish from this information. Moon planting is mainly linked to the amount of available water in the ground which I consider is affected my many greater forces than the pull of the moon, such as temperature, humidity, wind, rainfall and irrigation. I have not been able to find any scientific trials for moon planting. The trial carried out on Monty Don’s TV programme was a noted failure.
Other interesting links:
Water: Moon–Earth Relationships planting by moon phase - fact or fiction There are many claims (on the Internet) that moon planting works but I can’t find any real evidence !
Aunty still thinks it's shoe makers unless someone can
prove otherwise. :?