Can I plant arugula next to carrot?

Yes. Fast-maturing, non-competing salad-garden interplant.

Can I plant arugula next to lettuce?

Yes. Similar light/water needs; grown together as cut-and-come-again greens.

Eruca sativa

Spacing: 9 per square foot. Mature height: 0.5-1.5 ft.

Carrot: Fast-maturing, non-competing salad-garden interplant.
Lettuce: Similar light/water needs; grown together as cut-and-come-again greens.

No known antagonists recorded for Arugula.

Can I plant arugula next to carrot?: Yes. Fast-maturing, non-competing salad-garden interplant.
Can I plant arugula next to lettuce?: Yes. Similar light/water needs; grown together as cut-and-come-again greens.

Companion planting for Arugula: which plants to grow next to it, which to keep apart, and the reason behind each pairing.