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Growing Rhubarb

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

(Best months for growing Rhubarb in New Zealand - cool/mountain 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 41°F and 68°F. (Show °C/cm)
  • Space plants: 35 inches 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
    Young rhubarb

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

20 Apr 18, susan tauber (Australia - temperate climate)
I have dug my mature rhubarb up to move. What do i do with the huge roots. does it matter if some of the root is knocked off. thanks for your help
23 Apr 18, Mike (Australia - sub-tropical climate)
From Iowa state Uni -- US Rhubarb can be transplanted in early spring or early fall (mid-September through early October). Rhubarb does best in fertile, well-drained soils and full sun. The best time to transplant rhubarb is in early spring before growth begins. Carefully dig up the plant with a spade. Large plants may be divided into several sections. Each section should have 2 or 3 buds and a portion of the root system. Transplant each section into the garden with the buds 1 1/2 to 2 inches below the soil surface. Space plants 3 feet apart. Rhubarb also can be successfully transplanted in early fall. Fall planted rhubarb should be mulched with several inches of straw. The mulch provides additional time for the rhubarb plants to get reestablished before the ground freezes.
03 Apr 18, (Australia - temperate climate)
My 2 y/o rhubarb was growing well, then developed a coppery sheen on the leaves which go brown and papery, the stalks get soft, sag and go yellow. It is in raised area, watered regularly under the leaves, well manured and shaded from excessive summer heat. Any advice would be appreciated. Cathi.Dickinson
04 Apr 18, Mike (Australia - sub-tropical climate)
Put the symptoms into google and read up.
24 Mar 18, Soo-z (USA - Zone 9a climate)
Will rhubarb grow in Jacksonville, Florida -which is Zone 9A?
10 Mar 18, John Ryan (Australia - temperate climate)
I have a small rhubarb patch, 5-6 plants, in soil about 20cm deep, then clay. Plants have remained small (Northern Wollongong) and I wish to revitalise by digging plot deeper, and manuring appropriately. Can you advise which manures best to use? Advice appreciated. John Ryan.
11 Mar 18, Mike (Australia - sub-tropical climate)
Manures are much the same, just some have a bit more N in them - they range about 2-3% to 6-7% I think. Look up the internet. Just buy a bag from a nursery and mix it in well.
10 Feb 18, Mary Ann (Australia - temperate climate)
I have a rhubarb plant in a polystyrene box. It is growing well, and the stems are thick, but haven't coloured. Should I move it into shade?
12 Feb 18, Mike (Australia - temperate climate)
There is two types of rhubarb - green and red. Maybe you have the green variety. For 5-6 years I bought celery seedlings (the label shows a nice bunch of celery). Every year I end up with Italian Parsley or similar). Even from two different nurseries.
05 Feb 18, stephen lavell (Australia - sub-tropical climate)
I have a young blueberry plant and a raspberry plant . Ive potted them in large 85l pots with good soil but unsure where they should be positioned in my yard. The info that came with the plants is very confusing. Any help would be great. Thanks Steve Lavell
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