Bleeding hearts are shade-loving woodland plants that bloom in the cool of spring. After flowering for several weeks, the plants often become ephemeral, disappearing for the rest of the summer if exposed to too much sun or heat. But the roots stay alive, and bleeding heart will come back every year—regrowing either in the fall or next spring. Bleeding heart’s size ranges from around 1 to 3 feet high with a similar spread. The plant has a moderate growth rate, reaching its maximum size in around 60 days. Be mindful about where you plant it, as bleeding heart is toxic to people and pets. In addition, the flowers are delicate and require protection from strong winds. The best place to plant a bleeding heart is in an area that has a windbreak as well as some sun protection. Once established, it’s fairly easy to take care of a bleeding heart plant. It’s not overly prone to pests and diseases. And it has a bit of drought tolerance, though it still prefers moist soil for the healthiest growth. Plus, bleeding hearts will self-seed as long as the blooms remain on the plants. So bleeding hearts can live indefinitely in your garden, yet they don’t tend to spread uncontrollably.
Light
Bleeding heart does best in partial shade but also can handle full shade. Direct sun can cause the plant to go dormant early, cutting its blooming period short.
Soil
Bleeding heart prefers humus-rich, moist, well-draining soil with lots of organic matter. A slightly acidic to neutral soil pH is best. Prior to planting, it’s ideal to work a few inches of compost into the soil, especially if you don’t have organically rich soil.
Water
Bleeding heart likes a lightly moist soil. It doesn’t tolerate soggy or dry soils very well. Water throughout the growing season when the top inch of soil has dried out, even during summer dormancy to keep the roots hydrated. But make sure the soil doesn’t stay waterlogged, which can lead to root rot.
Temperature and Humidity
This plant’s ideal temperature is between 55 and 75 degrees Fahrenheit, and it has good tolerance for high humidity. As the summer heat ramps up, you’ll likely see the foliage yellowing. This is a perfectly normal sign of the plant going dormant to store its energy.
Fertilizer
Bleeding heart plants are not heavy feeders, so when to fertilize depends on the quality of your soil. If you have rich, organic soil amended every year, you likely won’t have to feed at all. If you have poor soil, you can apply an all-purpose, slow-release fertilizer in the spring. Also, as a woodland plant, bleeding heart does well with a top dressing of leaf mold.
Types of Bleeding Heart
There are several bleeding heart varieties with similar growing characteristics, including:
Lamprocapnos spectabilis ‘Alba’: Pure white flowersLamprocapnos spectabilis ‘Gold Heart’: Pink flowers and yellow-gold foliageLamprocapnos spectabilis ‘Valentine’: Bright cherry-red blooms with white tips and burgundy stems
Pruning
No major pruning is required, though you can trim back the foliage as it becomes brown and unsightly prior to dormancy. Fringed-leaf bleeding heart varieties can sometimes get a little ragged-looking and can be sheared back to their basal growth; they will re-leaf and rebloom. Refrain from deadheading (removing the spent blooms) if you want the flowers to go to seed.
Propagating Bleeding Heart
Bleeding heart is usually planted from nursery seedlings, but you can propagate bleeding heart from seeds, clump division, or stem cuttings. Propagation by cuttings is best done in spring to early summer. If you are starting from seeds in the garden, sow them in the fall. Propagation is a good way to rejuvenate older plants that tend to flower less. Here’s how to propagate bleeding hearts: Propagation by division: It is very easy to divide the root clumps of bleeding heart plants. You should divide after flowering is complete, so you don’t sacrifice blooms. The fringed-leaf varieties also divide nicely early in spring as they are emerging. Propagation by cuttings: Bleeding heart can also be started by cuttings rooted in a growing medium. It can take one to three weeks before rooting occurs.
How to Grow Bleeding Heart From Seed
To start seeds indoors, place the seeds in a pot of soil. Put the pot in a plastic bag, and place it in the freezer for six to eight weeks. Remove the pot, and gradually reintroduce the plant to light and warmer conditions. The change in temperature and exposure to sunlight will allow the seeds to germinate and sprout. Bleeding hearts also tend to self-seed in the garden, though not invasively. The tiny seedlings can be carefully dug up and transplanted.
Potting and Repotting Bleeding Heart
Bleeding heart plants do well as container plants, but conditions need to be right. When potting, opt for a large container—at least a 12-inch pot with drainage holes. Unglazed clay is a good material to allow excess moisture to evaporate through its walls. Use a quality, well-draining potting mix. Bleeding heart can live for four to five years in a large container before becoming root-bound and needing to be repotted. Either divide your plant, or move up to a container that will fit its root ball with a couple inches to spare between it and the container walls. Gently ease the plant out of its old container, and place it at the same depth in the new one. Fill around it with potting mix, and water well.
Overwintering
Bleeding heart will naturally die back during the winter season. But the roots should survive the cold weather, even if the plant appears dead above ground. As the plant depreciates prior to winter, you can cut the stems down to 1 or 2 inches from ground level. Keep watering the soil up until the first frost. At the start of winter, you can protect the roots and help them retain moisture by adding a 2-inch layer of mulch on top of the plant stems. Remove the mulch as the ground thaws in the spring.
Common Pests & Plant Diseases
The plant’s most significant pest problems are aphids, scale, slugs, and snails. The easiest and least invasive treatment for aphids and scale is using an insecticidal soap or neem oil. Slugs and snails are best remedied by physically picking them off and disposing of them in a bucket of soapy water. They are easiest to find at night and in the early morning. Furthermore, bleeding heart is prone to fungal diseases, including powdery mildew and leaf spot. In most cases, you can treat the plant with a fungicide. But if the plant has turned black and foul-smelling, it’s rotting and can infect other nearby plants. So it’s best to pull up the plant. If it was in a container, sterilize the entire container and throw out the soil. If the disease occurred in your garden, treat the planting spot with a fungicide.
How to Get Bleeding Heart to Bloom
Bleeding heart is usually a spring-blooming plant and will continue to flower into the summer until it gets too hot. However, note that this plant takes some time to establish and might not flower in its first growing season. Plants that are cramped and need to be divided also might not flower or flower less than what’s typical. To trigger the plant to bloom again in the season, you can stimulate new growth by cutting the plant down to 1 inch above ground level. Also, ensure that the plant stays out of the direct sunlight, which can hinder blooming.
Common Problems With Bleeding Heart
Bleeding heart plants don’t tend to be problematic when the growing conditions are right. Most of their common issues stem from inadequate watering or pest and disease problems.
Powdery Patches on Foliage
Spots of black, gray, white, or pink powder on bleeding heart leaves indicate powdery mildew, a treatable disease when caught immediately. A fungicide will remove the problem. To prevent powdery mildew from occurring, make sure plants are watered on the soil (not on the foliage) and that the plants have plenty of aeration and are not too crowded.
Brown or Black Spots on the Leaves
If bleeding heart develops small brown or black spots on the leaves that grow larger with a yellow ring or halo with the center of the ring beginning to rot out, then the plant likely has fungal leaf spot. Treatment with a fungicide or baking soda solution can neutralize the fungus if caught early enough. As the disease progresses, the leaves drop and the plant will die.
Yellowing Leaves
Bleeding heart naturally turns yellow and dies as the temperature increases. If that is the case, there is no reason to do anything. The plant is entering dormancy, which is its normal growth cycle. However, yellowing leaves can also occur if the plant is getting too much water, the soil is too alkaline, or the plant is getting too much sun. Adjust those conditions as necessary. Also, check the plant for an infestation of aphids. Aphids suck the sap out of plants, depriving them of nutrients, which can cause yellowing leaves. Yellowing can also be a sign of a fungal disease emerging. Verticillium or fusarium are severe fungal infections that start with yellowing. If your plant has this disease, it is not salvageable and should be destroyed before it spreads to other plants.
Browning, Blackening, or Rapid Wilting of the Plant
Diseases like verticillium wilt, fusarium wilt, botrytis, and root rot will cause a plant to fail quickly. Initial signs will be wilting, leading to all over browning or the plant beginning to rot. In the case of botrytis, it will appear like a gray mold is overtaking the plant. In most cases, if your plant is infected with these fungal issues and has begun browning or blackening, the plant is too far gone. You can attempt to resurrect it with a fungicide, but it’s not going to work in most cases. Remove all of the soil, discard it, and sterilize the container before using it again. Burn or seal the plant in a plastic bag before discarding it.
