Why is my arugula not growing faster? Bad pH levels? Too much peat moss and a mix of garden soil?
Certified GKH Gardening Expert
To know for certain if the soil is low on nutrients or the pH is off, you would need to get a soil test. Once you have the results, you can go from there. This article will help with additional growing information: https://www.gardeningknowhow.com/edible/vegetables/lettuce/growing-arugula.htm