This English heirloom variety was bred for early maturity and a long harvest window. Glaskin’s Perpetual Rhubarb is tart, but never bitter due to its naturally low oxalic acid content. If it’s given a good early start indoors, it can be harvested (late) during the first season’s growth. Some leaves should be left unharvested to encourage good root growth and a strong return the following summer. The thick, succulent stems grow 30-35 cm long, with a primarily pink and green pigment and some red markings. This is the best rhubarb variety for harvesting later in the year. Grow it in full sun, in rich, fertile, well-drained soil.