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Self Heal is a low growing, creeping perennial that is hardy in USDA zones 6-9. The foliage only grows to a height of 3-6 inches, but the plant will produce an abundance of 8-12 inch spikes of white, pink or purple blossoms from May through July.
Prunella laciniata grows well in any well drained garden soil, whether it be in full sun or light shade.
Self Heal plants dislike drying out, so regular deep watering is essential.
Feed your Prunella in the spring and mid-season with a balanced 10-10-10 fertilizer
Plant Prunella laciniata 12" apart in the garden any time after all danger of frost has passed.
Pinch back new growth on young plants to encourage them to branch out.
Be sure to remove spent blooms regularly to induce continued flowers.
Propagating Self Heal Plants
Self Heal can be grown from seeds sown in the garden in the fall or in the spring after all frost danger has passed. (NOTE:Prunella laciniata freely reseeds itself if the spent flowers are not removed)
If you are starting your Prunella seeds indoors, they will need to be stratified (chilled) in the refrigerator for a month before sowing them 6-8 weeks before your last frost date.
Self Heal seeds are very small and require light for germination so DO NOT COVER THEM!
Keep the temperature within the growing medium at 70°-75°
Germination will take place within 10-14 days.
Self Heal plants can also be propagated by dividing plant clumps in the Spring or early Fall.