"How can you grow 4 trees so that the distance between all of them is equal?" is the correct way to write your question.

To ensure that the distance between the trees is equal, you must measure, somehow (keeping in mind that there are no straight lines in nature and that "symmetry is the death of art"). You might mark out the distance simply by pacing it, that is to say counting the same number of steps, or strides, between intended planting locations - being careful to walk in a regular and consistent style, but not being concerned to measure right down to the very millimetre, because that level of fussiness is inappropriate. If you are serious, you can buy a 'measuring wheel'. These are useful if you are dealing with greater distances, say if you want to put four trees equidistant along one side of a football pitch, which I have to say is a fine idea. Look at these! (http://www.justtools.com.au/category319_1.htm). If you cannot afford to purchase this specialist tool do not despair; you can easily make one at home. Buy or otherwise acquire a lightweight wheel of some sort, the circumference of which is a convenient length, and fix it by its axle to a pole of some sort, or perhaps a plank, like a fence paling. Mark the circumference somewhere (a stripe of paint will do) so you can count how many times it comes past the pole as you are walking along. Even better, fix a card to the wheel that can flick over the pole each full revolution, and count the clicks by ear. If a measuring wheel is too much work, and you don't trust your gait then there's always string, with which it is a well-known fact that you can't go wrong. I hope this has been helpful.

hi, i think you should tie this 4 trees tightly into a bunch first...:-)

Hello I know how to plant 3 trees at the same distance then...

Hi! The most common arrangement for planting trees is the square and the rhomboid arrangement. It is easy to achieve both with a rope and a compass. Take the rope and tie it on a big metal nail that you fix in the ground. With the aid of the compass align the rope once to each direction of the horizon and at the certain, measured distance, plant each of the other trees. Orientation might have to be influenced by local factors as mountain shadows or other higher trees in vincinity. Distance between trees is directly related to the desired height that the new trees will eventually reach.