Purple giant hyssop (Agastache scrophulariifolia)

Purple giant hyssop

Purple giant hyssop (Agastache scrophulariifolia) is a perennial that blooms in summer with lavender-pink tubular-shaped flowers. Bees and butterflies are attracted to the nectar from the flowers while a variety of birds like to feast on its seeds. It thrives in full sun to partial shade and prefers moist well-drained soil. It can be distinguished by its green stems and green undersides of its leaves.

Scientific classification

Species

Purple giant hyssop (Agastache scrophulariifolia)

Mints plantains olives and allies

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Perennial

Lifespan

Herb, Shrub

Plant Type

Late spring, Summer, Fall

Bloom Time

91 cm to 1.8 m

Plant Height

Deciduous

Leaf type

0 - 32 ℃

Ideal Temperature

Images of Purple giant hyssop

Care Guide for Purple giant hyssop

Every week

Water

Full sun

Sunlight

0 - 32 ℃

Ideal Temperature

Water: Originating from temperate regions, purple giant hyssop prefers consistent moisture and can tolerate brief dry spells. Watering weekly is recommended to avoid waterlogging. Thriving in well-draining soil, purple giant hyssop adapts well to outdoor settings, supporting its seasonal growth cycle and varying water needs.

Fertilize: For optimal health, purple giant hyssop needs bi-monthly balanced nutrition fertilizer during the growing season. Use a diluted solution to avoid root burn and reduce feeding in fall for dormancy. Monitor soil fertility, as over-fertilization can impede growth and blooms.

Pruning: Purple giant hyssop, known for its tall purple flower spikes, requires early to late spring pruning to promote growth. Cut old stems to the base for new shoots and airflow. Deadhead spent flowers to encourage blooming, ensuring an attractive garden display and optimal plant health.

Propagation: Purple giant hyssop is best propagated by division, promoting healthy root growth and genetic consistency. Gardeners should choose strong clumps and separate them into smaller sections, ensuring each has enough roots for independent growth. Proper handling and soil preparation are essential for successful establishment.

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