Bleeding hearts are extremely hardy plants, thriving in a broad swath of USDA Plant Hardiness zones, 2a to 9b. With arching stems full of beautiful pink and white flowers, bleeding hearts make a stunning focal point for the woodland-themed garden. In New Hampshire bleeding hearts enjoy an acidic to mildly acidic soil pH, in a cool, moist area.
Choose the part of the garden in which you want to plant your bleeding hearts. Generally, these plants need light shade for most of the day, but in New Hampshire, many gardeners plant them in the sun and they do quite well. As long as the bleeding heart isn't exposed to too much heat, it should thrive.
Amend the soil in the planting area by adding a 1-inch layer of sphagnum peat moss and a 1-inch layer of compost to the soil. Use the gardening fork to mix the amendments in with the existing soil, to a depth of 8 inches.
Dig a hole the same depth and twice the width of the pot in which the bleeding heart is planted. Remove the plant from the pot and gently lower it into the planting hole. Backfill around the roots with soil and press the soil gently around the base of the plant.
Water the area with the fine mist setting on the hose.
Apply a 2-inch layer of mulch around the base of the plant. This will help the soil stay moist and discourage the growth of weeds. Each spring, apply a 1-inch layer of new compost around the plant and a fresh layer of mulch.
Water the bleeding heart once a week with 1 inch of water. If it rains, you can postpone the watering to the following week.
Cut the stems of the bleeding heart to 2 inches after the first frost.