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Physostegia are long blooming and easy to grow. Many spikes of flowers in mid summer. Each spike holds its many flower buds in rows which open sequentially from bottom to top. Will take any space you give it, making a glorious show en masse. Best selection for the coldest areas (zones 3 & 4), not for the Gulf states.
Idaho has restricted all potted plant material from being shipped into Idaho
at this time.
Prefers average, moist soil, and will even thrive in swampy areas with poor drainage. Can be divided every other year in spring. To prevent flopping, pinch back plant by 1/2 in spring. Deadhead to prolong blooms to a lateral bud or leaf. Old foliage can be cut back after frost or in spring.