
(And How To Fix It)
- Rhubarb is Thin Because Plants Are Too Young. One of the most common reasons for rhubarb being thin is that the plant is simply too young. ...
- Not Enough Growing Space Causes Thin Rhubarb Stalks. ...
- Insufficient Soil Nutrients Cause Rhubarb to be Thin. ...
- The Wrong Variety of Rhubarb Causes Thin Stalks. ...
- Inadequate Care Causes Thin Rhubarb Stalks. ...
Why are my rhubarb stalks small and spindly?
Newly planted rhubarb will initially produce small, spindly stalks during its 2 year establishment period. The stalks of large, old plants may be small and spindly because of overcrowding. Poor plant vigor due to poor cultural practices is another possibility. After planting rhubarb, wait 2 years (growing seasons) before harvesting any stalks.
What to do if your rhubarb is too thin?
If your rhubarb is too thin, you can provide it with the right growing conditions for it to grow healthy thick stalks that you will love. Why does my rhubarb have such skinny stalks?
Is my rhubarb thick or thin?
It’s possible that your rhubarb is one of the thinner-stalked varieties, as some types of rhubarb have thicker stalks than others. For example, Cherry Red, Riverside Giant (green variety), and Mammoth Red will all produce very thick, succulent stalks. Meanwhile, Canada Red will yield tasty yet more slender stalks.
When can I Harvest rhubarb stalks?
After planting rhubarb, wait 2 years (growing seasons) before harvesting any stalks. The two year establishment period allows plants to become strong and productive.
See more

How do I make my rhubarb stalks thicker?
You can add organic compost or manure to your soil, but to really get your rhubarb stalks to thicken up, you might want to use an organic fertilizer that will give you a more reliable balance of nutrients. An organic edible plant fertilizer like this one will work well.
What causes rhubarb to be spindly?
Answer: Newly planted rhubarb will initially produce small, spindly stalks during its 2 year establishment period. The stalks of large, old plants may be small and spindly because of overcrowding. Poor plant vigor due to poor cultural practices is another possibility.
Can you eat skinny rhubarb stalks?
The stalks are the only edible part of the rhubarb plant. These have a rich, tart flavor when cooked. The leaves of the rhubarb plant are toxic. They contain an irritant called oxalic acid, so be sure that they are not ingested.
What is the best fertilizer for rhubarb?
Rhubarb plants respond best when they are fertilized with 10-10-10 fertilizer or a combination of composted manure and phosphorus. While 10-10-10 fertilizer is a great choice, if you want to follow an all-natural gardening plan, the compost-and-phosphorus method is the organic choice for rhubarb.
How do you make rhubarb grow bigger?
Rhubarb is a heavy feeder and needs to be planted in soil high in organic matter if you want to have large, thick rhubarb stalks. It helps the plant to cultivate around it, and to keep it mulched, weed-free, and well watered. The plant also likes a neutral pH soil.
How do you rejuvenate rhubarb?
Rejuvenate old rhubarb An old, neglected patch will often only throw up only weak, spindly stems due to overcrowding. If this looks familiar, the best thing is to dig up the whole root (called a 'crown') in winter and split it using a spade, making sure there are a few buds on each new piece.
Should I fertilize my rhubarb?
Rhubarb requires annual fertilizer applications for good growth and large yields. Apply fertilizer in early spring before growth starts. Broadcast 1⁄2 cup of an all-purpose garden fertilizer, such as 10-10-10, around each plant and work it lightly into the soil. Avoid getting fertilizer directly on the crown.
Do rhubarb plants need lots of water?
Water and Moisture Requirements If your rhubarb is getting too dry, water is well, about an inch every week. Watering needs to be "deep watering" to allow the roots to benefit. Rhubarb should not be overwatered because it is susceptible to crown rot.
When should you not pick rhubarb?
A good rule of thumb is to pick your rhubarb no later than July 4. The harvesting period typically lasts about 8 to 10 weeks. Rhubarb plants are dormant during the fall and winter. If you try to harvest your rhubarb too late, the stalks might get frost damage and be inedible.
Are coffee grounds good for rhubarb?
Most vegetables like soil on the slightly alkaline side, but acid-loving vegetables like radishes, parsley, potatoes, peppers and rhubarb can get a boost from fresh coffee grounds.
How often should you water rhubarb?
Rhubarb plants benefit from getting 1–2 inches (2.5–5 cm) of water per week. Water your rhubarb once every 3 days through the first year. In later years, your rhubarb will only need to be watered once per week. Always give rhubarb a good soaking all around the base of the plant.
Can you overwater rhubarb?
While mature plants can be somewhat tolerant to drought, rhubarb in its first two years of growing needs regular watering. However, don't overwater rhubarb, as the crowns can rot in wet soil. A good rule is to water the plant when the top inch of soil dries out.
Can rhubarb stalks be poisonous?
The stalks of a rhubarb plant are safe to eat. You can even eat them raw—but be warned, they're very tart! However, the large, smooth, heart-shaped leaves are toxic. “Rhubarb leaves are considered poisonous to humans and animals due to high concentrations of oxalic acid,” says Dr.
Is it safe to eat green rhubarb stalks?
Can I eat green rhubarb stems? MILLIE: Absolutely! Green stems are just as delicious as the red stems we are more familiar with on other varieties of Rhubarb. Many rhubarb varieties never develop red stems at all, but they are no less tasty than the others.
How can you tell if rhubarb is edible?
The stalk will pop, separate from the rhubarb plant at the root and come cleanly away. The twisting and pulling motion should be gentle. If the rhubarb stalk doesn't come away immediately, grasp it lower and try leaning it in the other direction.
How do you know when rhubarb is bad?
When it comes to sure signs that you should discard your rhubarb, look for:Mushiness. Rhubarb is very firm. ... Large black or brown spots.Mold. If there's quite a lot of mold on the stalk (and not only a minuscule amount like on the photos above), discard it.Off smell. If it smells off, there's something wrong with it.
Young Plants
It takes rhubarb plants two years to become established. During this period, it’s normal for the plant to produce spindly rhubarb stalks. Harvesting during this establishment period can reduce the vigor of the plant.
Overcrowding
Rhubarb is a long-living perennial that can grow for decades. Each spring brings an abundance of new shoots emerging from the crown. Eventually, this causes overcrowding and thinning rhubarb stalks.
Flowering
The formation of flower buds prompts plants to divert energy into the production of blossoms. This may be the cause of your rhubarb being leggy in appearance.
Lack of Vigor
Poor soil and drought conditions can reduce a rhubarb plant’s overall health. Seeing thin rhubarb stalks on a mature, established plant that is not overcrowded can be a sign of declining growing conditions.
Competition
Mature rhubarb plants can grow quite large. Competition from other plants or weeds reduces the nutrients available for each individual plant. The result is a decrease in stalk diameter and spindly rhubarb plants.
Overharvesting
Typically, rhubarb is harvested during the spring months when the stalks are still young and tender. Continually harvesting rhubarb stalks throughout the growing season stresses the plants. This reduces yields and causes thinning stalks the following year.
Incorrect Environment
Rhubarb is a winter hardy perennial which thrives in USDA hardiness zones 3 to 6. Some gardeners report being able to grow rhubarb as an annual in zones 7 and 8.

Young Plants
Overcrowding
- Rhubarb is a long-living perennial that can grow for decades. Each spring brings an abundance of new shoots emerging from the crown. Eventually, this causes overcrowding and thinning rhubarb stalks. The solution: old plants benefit from periodically dividingthe crown. This can be done in the spring or fall. To reduce transplantshock, dig rhubarb ro...
Flowering
- The formation of flower buds prompts plants to divert energy into the production of blossoms. This may be the cause of your rhubarb being leggy in appearance. The solution: remove flower buds as soon as theyappear. Flowering is a natural part of the plant’s life cycle and mature plantstend to be more prolific in terms of flower production. Environmentalconditions can also tr…
Lack of Vigor
- Poor soil and drought conditions can reduce a rhubarb plant’s overall health. Seeing thin rhubarb stalks on a mature, established plant that is not overcrowded can be a sign of declining growing conditions. The solution: In arid climates and during periods ofdrought, water rhubarb weekly. Apply an organic rich compost to the top of thesoil or side dress rhubarb plants with a balanced(…
Competition
- Mature rhubarb plants can grow quite large. Competition fromother plants or weeds reduces the nutrients available for each individualplant. The result is a decrease in stalk diameter and spindly rhubarb plants. The solution: allow two to four feet (61 to 122 cm.) betweenplants and a minimum of three feet (1 m.) between rows. Control weeds with mulchor by shallow hoeing and hand wee…
Overharvesting
- Typically, rhubarbis harvestedduring the spring months when the stalks are still young andtender. Continually harvesting rhubarb stalks throughout the growing seasonstresses the plants. This reduces yields and causes thinning stalks thefollowing year. The solution: harvesting a few stalks from established rhubarb plants for a special summertime treat isn’t a problem, but avoid heavy …
Incorrect Environment
- Rhubarb is a winter hardy perennial which thrives in USDAhardiness zones 3 to 6. Some gardeners report being able to grow rhubarb as anannual in zones 7 and 8. The solution: for thick stalks and healthy plants,grow rhubarb in areas where the average daily summertime temperature remainsbelow 90 degrees F. (32 C.). Properly cared for rhubarb plants will produce plenty of thic…