Rumex acetosella aka Field Sorrel

Rumex acetosella, also known as red sorrel, sheep's sorrel, field sorrel and sour weed, is a common perennial weed in Eurasia and the British Isles. It has green arrowhead-shaped leaves and red-tinted deeply ridged stems, and it sprouts from an aggressive and spreading rhizome. The flowers emerge from a tall, upright stem and female flowers are maroon in color. In North America, it can be found primarily in open, disturbed soils of roadsides and degraded fields and prairies. It is often confused with Green Sorrel, which is a larger plant with bigger flowers and fruits, and much larger leaves with basal lobes that point downward. Despite being a weed, Sheep Sorrel has some uses. Its leaves can be eaten raw or cooked, and they have a lemony, tangy or rhubarb-like tart flavor. It can be used as a garnish, a tart flavoring agent, a salad green, and even as a curdling agent for milk in cheese-making. However, because it is considered a weed, chemical controls such as Roundup may be used to get rid of it, but only when the plant is growing, and several applications may be needed to kill the rhizomes. Interestingly, Sheep Sorrel can also be grown as a houseplant. It is a super rare houseplant that is easy to grow and needs regular watering to thrive. It does best in long-lasting, direct light and should be less than 1 foot from a window. Sheep Sorrel likes soil that is well-draining, and it shouldn't need added fertilizers if you repot each time it doubles in size. Sheep Sorrel belongs to the Rumex genus and is native to Eurasia and British Isles.