Home / Perennial / Minnruby Mum You cannot add "Marshmallow- Althaea officinalis" to the cart because the product is out of stock. Minnruby Mum$4.50 Dark red Chrysanthemum, 2″ to 2-1/2″ double blooms atop a 12″ high, 20″ wide cushion plant. A somewhat smaller and earlier Ruby Mound. Sold in 4″ pots. Available for pick up in late May/ early June. Available on backorder Minnruby Mum quantity Add to cart Category: Perennial Related products Mint- Chocolate (plant) $5.00 Add to cart Skullcap- medicinal perennial (plant) $4.50 Add to cart