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Named after Mary Gregory of Columbia, S.C. and introduced by Kim Hawkes of Niche Gardens. Light yellow flowers cover the lax 2' stems, of this U.S. native, in midsummer for 3-4 weeks. Deadhead to prolong bloom. Full sun in acidic, well-drained soil. Considered drought tolerant once established. Remains evergreen in warmer climates. Attracts butterflies! Beautiful combined with blues, pinks or purples in the garden.
Grow in light, fertile, moist but well-drained, acidic soil.
Liable to rot in damp, heavy soils.
Provide support and deadhead to prolong flowering.
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