Oudolf's Stachys Spires (The Battery Gardens-Part 2)

Spires of pink-purple Stachys monieri 'Hummelo' (Alpine betony). Gardens of Remembrance at The Battery, New York, NY. June 2011 I know it, I grow it. But, exponentially increase the number of plants and the result is jaw-dropping! Stachys monieri 'Hummelo' inspires as a major player in the mass planting at the Gardens of Remembrance within The Battery in New York City. The design is by Dutch designer Piet Outdolf . 'Hummelo' is not your ordinary stachys . The crinkled green foliage is lush and in my zone 7b garden, it never dies back completely in the winter. Like many perennials, you'll know to divide it when a shallow pit (not quite a donut hole) appears in the middle. Suitable for zones 4-9, I find this perennial likes rich, well-drained soil and mostly sun. When it needs water, the plump mounds look totally deflated. Just add water to the base. A nice size of around 18 inches high (in bloom) and 15 inches wide, makes this a suitable plant for smal...