Growing Rhubarb

Rheum rhabarbarum : Polygonaceae / the dock family

Jan F M A M J J A S O N Dec
      P                

(Best months for growing Rhubarb in USA - Zone 5a regions)

  • P = Plant crowns
  • Easy to grow. Plant pieces of rhizome or roots 8 - 10 cm (3 - 4 in.) deep. Best planted at soil temperatures between 5°C and 20°C. (Show °F/in)
  • Space plants: 90 cm apart
  • Harvest in approximately 1 years. You will have a stronger plant if you leave it for about a year before using..
  • Compatible with (can grow beside): Brassicas (Cabbage, Broccoli, Cauliflower, etc)
  • Young rhubarb
  • Rhubarb Plant

Rhubarb is easy to grow in cool climates and is a perennial. Rhubarb can be left in the ground and will return a crop for many years, at least 10 to 15 years (We have one that is more than 20 yrs old). Rhubarb is quite a hardy crop but the crown will rot if in heavy wet clay soils. It can cope with dry periods. Plant in good soil and remove as many weeds as possible. Do not disturb rhubarb roots when cultivating round the plant. Better in cooler climates, but can be grown in shady areas of warm climates. You can lift and divide rhubarb to make more plants . It is best to do this when the plant is dormant ( or at least less actively growing) in winter or late autumn. It is best to wait until a plant is about 5 years old before dividing the crown but it can be moved at any age. Some of the root structure will be damaged when lifting it, so stalk production will not be so good for a few months. If you have mild winters and your rhubarb is still producing new stalks, you can continue to pick it. Although rhubarb is used in desserts and jams, it is considered a vegetable because the stalks are used not the fruit.

NB Do not eat the leaves or roots as they contain oxalic acid which is poisonous. They should not be fed to poultry or stock either.

Remove flower stalks as they appear as the plant will stop producing leaf stalks when flowering.

Rhubarb can be 'forced' by covering dormant crowns with clay pots or a cloche in early spring.

Culinary hints - cooking and eating Rhubarb

Pick stems about the thickness of your finger. Large stems will have tough 'strings' down the length of them.
Use in pies, crumbles, fools and jams. Rhubarb goes well with orange.
Will usually need sweetener.

Your comments and tips

01 May 23, Julia (Australia - temperate climate)
I planted rhubarb around 7 months ago, the leaves have grow huge and some are mottled and unhealthy. I know I am not supposed to harvest for the first year...so how do I treat the plant? Do I just leave it be, or do I need to trim it or remove leaves? Does the same stalk stay until harvest time? Please advise care of plant in first year of growing until harvesting time. Thank you so much! Warmest regards
08 May 23, (Australia - sub-tropical climate)
If unhealthy pull them off. Look up a natural spray for leafy veggies.
12 Apr 23, Judy James (Australia - temperate climate)
My rhubarb has got new growth at the moment in April but I would like to transplant it. When is the best month please? Thanks. Judy
19 Apr 23, (Australia - sub-tropical climate)
August Sept
28 Mar 23, Vince (USA - Zone 9a climate)
Is there a strain of rhubarb that grows in zone 9a?
24 Mar 23, kathy cadler (Canada - Zone 3a Temperate Short Summer climate)
Can I harvest rhubarb all summer in zone 3a safely? I read recently that late summer harvests are poisonous . I’ve heard and have been practicing harvesting 1/3 or less of the plant at a time. Then I wait 2 weeks before harvesting again all summer long. I have big healthy beautiful plants that are over 20 years old.
23 Mar 23, (USA - Zone 10b climate)
I read that kangarhu rhubarb is good for zone 9B. They are heat tolerant I'm going to try one.
23 Mar 23, (USA - Zone 5b climate)
When can I plant rhubarb plants outside in zone five I grew them from seed inside my house?
15 Mar 23, Peter McDougal (United Kingdom - cool/temperate climate)
Why does my Rhubarb taste earthy
05 Mar 23, Steve Gollis (USA - Zone 12b climate)
Any varieties that will grow in Zone 12? I wouldn't mind trying one of the Zone 8 varieties, but I think I would have to harvest it the first year because it looks like it won't be happy without some cold. Any advice will be helpful, I miss my rhubarb dishes and it's like pulling teeth to get the stores to stock it! Thanks!
Showing 1 - 10 of 607 comments

I am from East Washington but moved to Texas. Rhubarb is one of my favorite things and when I was growing up in my Washington hometown, my grandma had a huge, really old rhubarb plant that had been producing stalks since before I was born. And I would just pull a stalk out of the ground, wash off with her hose, and snack on whenever I felt like it. Well, I married a military man, and he got stationed in San Antonio and then he got offered a civilian job here, so we are now here to stay. I would really like to grow rhubarb in my garden, especially because I can't even find it here in the store (and the only two times I have found it fresh in the store, the cashiers didn't even know what it was. I kid you not. That's how rare rhubarb is here, so uncommon that the locals don't even know what it looks like as a fresh vegetable). Anyway, does anyone know how I might grow rhubarb here in my new climate? I really miss it. Thanks!

- Washingtonian in Texas

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