I knew it had to be at least 2 foot either side of the Cordons,i have bulbs and herbs around the base of my trees/cordons which are 2 foot away from the base and have never had any problems with either,they are planted in a raised bed 18" off the ground by 30" width and 8 ft long,and have a plum and a duel Pear in that bordr along with the herbs and bulbs and all thrive greatly where as my Apples are in a seperate raised border,same dimensions but 6 ft long,split into 3,Apple on each end and bulbs in the middle,Another Apple tree in its own border with red cordylines either side and again inter planted with bulbs and ground covering sedums and all thrive happily together.
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I knew it had to be at least 2 foot either side of the Cordons,i have bulbs and herbs around the base of my trees/cordons which are 2 foot away from the base and have never had any problems with either,they are planted in a raised bed 18" off the ground by 30" width and 8 ft long,and have a plum and a duel Pear in that bordr along with the herbs and bulbs and all thrive greatly where as my Apples are in a seperate raised border,same dimensions but 6 ft long,split into 3,Apple on each end and bulbs in the middle,Another Apple tree in its own border with red cordylines either side and again inter planted with bulbs and ground covering sedums and all thrive happily together.