The cucumber is an amiable presence in the garden, not out to offend anyone. Yet, for one reason or another, a few plants should not become its neighbor. When designing your cucumber patch, avoid planting the following:
Gardeners agree on this one: cucumber and sage do not get along in the garden. The reason seems to be that sage has a powerful scent, and its intense aroma can affect the flavor of your cukes. On the other hand, dill is a friendly herb to cucumber, so rely on it for your herb companion garden plant.
You might think that a tuber such as the potato would be a good friend to an aboveground vine such as cucumber, but these two plants compete for the same nutrients in the soil and tend to diminish one another instead of helping. A better root vegetable for cucumber is radish.
So useful for repelling garden pests, rue does not make a good neighbor to many vegetable crops. Another strongly scented herb that can affect the flavor of cucumbers, it is best kept away from this crop.