The Worst Herb Pairings: 7 Herbs You Should Never Grow Side By Side

Like basil and sage, rosemary and basil have immensely different watering and soil requirements. Rosemary loves dry, well-draining soil, while basil needs consistent moisture to be able to thrive. While the two can be extremely fragrant in the garden, they definitely shouldn’t be paired.
A better approach to pairing these herbs would be to grow rosemary with thyme and basil with parsley. These are much more harmonious combinations.
6: Chives & Beans
As strange as this pairing sounds to the ears, it’s actually not that uncommon. Many gardeners plan on growing chives and beans together but later wonder why their bean growth slowed down. It’s mainly because chives release compounds that slow the growth of beans.
A better alternative to this is to grow chives near something like tomatoes to help repel pests as well as contribute as a companion plant effectively.
7: Oregano & Marjoram

Oregano and marjoram can unfortunately cross-pollinate and alter each other’s flavor profile. It doesn’t necessarily mean the herbs will taste bad or anything; they just won’t have the same flavor you would expect them to have, which definitely isn’t ideal.
If you have a large enough garden, you can plant oregano and marjoram in separate areas away from each other. If you’re planting in pots, plant them in separate containers, or else you’ll be faced with unnecessary trouble you don’t want to deal with.