Rhubarb is the botanical world’s favourite paradox: technically a vegetable, legally a fruit (at least according to a 1947 NY court ruling), and famously sour enough to make your eyes water if eaten raw.
Often referred to as "pie plant," it is a cool-weather perennial that looks like a neon-pink version of celery. Here is a breakdown of what makes this plant so unique.
Appearance and Flavour The Stalks: Rhubarb is prized for its long, crisp stalks. They range in color from a pale, speckled green to a deep, ruby red. Contrary to popular belief, the redder stalks aren't necessarily sweeter—they just look prettier in a tart. +1
The Taste: On its own, rhubarb is intensely tart and astringent. It has a bright, "green" acidity that acts as a perfect foil for heavy sweets.
The Leaves (The "Danger" Zone): While the stalks are delicious, the leaves are toxic. They contain high concentrations of oxalic acid, so they are always trimmed off and discarded before the plant hits the kitchen.
Culinary Uses Because it is so incredibly tart, rhubarb is rarely the solo star of a dish without a massive supporting cast of sugar.
The Strawberry Connection: It is most famously paired with strawberries. The sweetness of the berry balances the sharp acidity of the rhubarb.
Classic Dishes: You’ll typically find it in crumbles, pies, galettes, and jams.
Savoury Twist: In some Middle Eastern and Nordic cuisines, it’s used as a souring agent for stews or paired with fatty meats like pork or duck to cut through the richness.
A Bit of Trivia: "Forced" Rhubarb In some parts of the UK (the "Rhubarb Triangle"), farmers grow rhubarb in complete darkness in heated sheds. Because the plant grows so fast in the dark, you can actually hear it snap, crackle, and pop as the stalks expand. This "forced" rhubarb is considered a delicacy because it’s more tender and sweeter than the garden-grown variety
Growing rhubarb is remarkably rewarding because it’s a "set it and forget it" perennial. Once established, a single plant can keep producing for 10 to 15 years. It’s a cold-weather champion that actually needs a winter chill to thrive.
Here is how to get your rhubarb patch started.
Sunlight: They love full sun but can handle partial shade (especially in warmer climates).
Soil: Rhubarb is a "heavy feeder." It needs deep, well-drained soil packed with organic matter (compost or rotted manure). It hates "wet feet," so avoid boggy spots where the roots might rot. +2
Dig a hole about 12 inches deep and wide.
Place the crown so the "eyes" (buds) are about 2 inches below the soil surface.
Space plants at least 3 feet apart. They get surprisingly huge!
Year 2: You can take a light harvest (just a few stalks).
Year 3+: Harvest to your heart's content!
Watering: Keep it well-watered during the heat of summer. If the plant gets thirsty, the stalks will get "stringy."
Remove Seed Stalks: If you see a tall, thick, flowery stalk grow from the center, cut it off immediately. You want the plant’s energy going into the edible stalks, not producing seeds.
Grasp the stalk near the bottom.
Pull firmly upward while giving it a slight twist. It should "pop" away from the base.
Immediately trim the leaves and put them in the compost
The "how" of harvesting rhubarb is just as important as the "when," because doing it incorrectly can actually damage the plant's crown and lead to disease.
Here is the professional way to harvest your stalks:
Grasp the stalk firmly near the base (at the soil level).
Apply a steady, firm upward pull while simultaneously twisting the stalk slightly to one side.
You should hear a satisfying "pop" as it detaches cleanly from the crown.
Why? The leaves contain high levels of oxalic acid, which is toxic to humans and pets.
Bonus Tip: Trimming them right away also prevents the leaves from pulling moisture out of the stalk, keeping your harvest crisp for longer.
The 1/3 Rule: Never harvest more than one-third of the total stalks at one time. The plant needs the remaining leaves to photosynthesize and store energy for next year’s growth.
Thin Stalks: Leave any stalks that are thinner than a pencil; they aren't worth eating and are better left to help the plant grow.
Stop in Mid-Summer: Most gardeners stop harvesting by July. This gives the plant a few months of "rest" to prepare for winter.
Thickness: Look for stalks that are about the thickness of a finger.
Colour doesn't matter: Don't wait for the stalks to turn entirely red. Some varieties stay green or speckled even when they are perfectly ripe.
Pro Storage Tip: Rhubarb wilts very fast once picked. Wrap the stalks (leaves removed!) in a damp paper towel, put them in a plastic bag, and they’ll stay crisp in the fridge for about a week
