When can I transplant mustard greens?

Question: I’m growing mustard plant in large containers to keep them away from pests. When can I transplant mustard greens? -Tom W.

Answer: You may transplant mustard seeds when the seedlings have been raised indoors and it’s time to move them into the garden, or you may need to transplant your mustard greens later during their growth period as they get larger in size and need more space between plants.

Whether you’ll be moving your mustard green plants to a container or a new location in the garden plot, begin by preparing the soil. Work compost or an appropriate fertilizer into the top few inches of the ground, then make holes to accommodate the root systems of the mustard greens plants that you need to move. When you’re choosing the spots your plants will be transplanted into, make sure to leave at least a foot between rows of mustard greens plants and three to six inches of space between plants in the rows.

In the situations when transplanting is needed, the mustard greens will most likely be growing together in clumps of three or four plants. Gently move the leaves so you can see where the root systems are for each plant, and determine which plants have clumped together so you can dig them up together. The roots may still be intertwined with neighboring groups of plants, so if needed, use a clean, sterilized knife or the edge of your trowel to slice through the roots and free the clump of plants you’re digging up. Also ensure that you dig deeply enough to get the entire root system without unnecessary breakage.

Move the newly uprooted clump of mustard greens plants into its new location, separating into individual plants as needed. Place a plant in each of the holes you prepared, and fill in around the roots with soil, pressing it down with your hands to help the plants stand upright securely. Water the plants deeply after transplanting to invigorate the roots and encourage their growth. A layer of mulch or compost on top of the soil where mustard greens are growing will go a long way toward keeping the soil cool and helping the ground to retain water and keep it available for your newly transplanted mustard green plants.