Agastache Black Adder (Giant Hyssop)
- Usually Flowers : June, July, August, September, October
- Suitable for cut flowers
Attractive upright spikes of lilac-blue flowers with an aniseed scent above dark green foliage. July to October. Ht.90-120cm.(3-4ft.). Full Sun. Average to moist soil. Attractive to butterflies. Good border plant. Good for cut flowers.