A sunny position is most important for plants to grow well. For strength you must point the gable end towards the prevailing wind. If there is a slight slope on the site you should run the length of the Polydome down the slope (apart from structural reasons this will help ventilation). You need to allow room all around the Polydome for digging trenches and avoiding snagging the cover on things, if we are constructing we ask for about 1.5m on either side of the Polydome and 2m at either end if possible. You should have some shelter from prevailing winds using trees or windbreak net which will filter the wind. You should avoid choosing a stony, boggy or very sloping site if possible as it requires extra materials and work to build.