There must be an underlying issue with the spot. It could be a number of things… Does water tend to pool there? Or are there roots or rocks in that spot that prevent the plants from rooting well enough to survive the heat of summer? Is the spot exposed to more—or less—sunlight than elsewhere? Does a pet like to use that spot to do his or her business? Consider what might set that spot apart from the rest of the bed, and also remember to amend the soil with compost or fertilizer every now and again.
There must be an underlying issue with the spot. It could be a number of things… Does water tend to pool there? Or are there roots or rocks in that spot that prevent the plants from rooting well enough to survive the heat of summer? Is the spot exposed to more—or less—sunlight than elsewhere? Does a pet like to use that spot to do his or her business? Consider what might set that spot apart from the rest of the bed, and also remember to amend the soil with compost or fertilizer every now and again.