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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
  • 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

28 Nov 18, Heather (New Zealand - cool/mountain climate)
We have just arrived In New Zealand and our place has a rhubarb plant in the garden. I have been trying to find out how to look after it and I think I have that information but I can't find out the best time to harvest the rhubarb in New Zeland. Can you help tell me when to harvest please? Thank you.
29 Nov 18, Mike (New Zealand - cool/mountain climate)
It says dormant during winter so when it has a good production of leaves/stalks in the spring you could start harvesting depending on the age/size of the crown. Probably ease off harvesting late autumn. Other people here might have a better idea than me as I don't grow it.
14 Jul 18, christine cunliffe (New Zealand - temperate climate)
can you grow rhubarb in shade
12 Sep 18, Mike (New Zealand - temperate climate)
Read the notes here. A cool weather crop. In warmer climates it can be grown in some shade.
29 Jul 18, Brigitte (New Zealand - temperate climate)
Our Rhubarb was grown in semi shade with sun for the morning till afternoon under a leaky spouting ;) and it grew beautifully, huge leaves also. We moved one crown to a rather shady area which got little sun and it failed to thrive for a start - again we got large leaves, but the stalks were quite thin, so in a nutshell....semi shade with some sun seems to be best :)
28 Jul 18, Bob Jenkins (New Zealand - sub-tropical climate)
Christine, I live in the Bay of Plenty NZ and have copious crops of rhubarb from four well established plants that grow to the south of a lemon tree . The most southern plant is much more vigorous than the plant nearest the lemon which is partially shaded by it. In fact the rhubarb plants are progressively happier the further they are away from the shade which certainly proves that they are sun lovers, however the shadiest plant does provide a reasonable yield.hope this helps Bob jenkins
15 Jul 18, John (Australia - temperate climate)
All plants need some sunshine. Rhubarb as a leaf crop will grow with less than tomatoes, beans, etc. An hour or two in the morning would be good but if you don't get direct sun but still plenty of light I would give it a go. You can always transplant it to a better spot, maybe in a tub, next winter
18 Feb 16, Relda (New Zealand - temperate climate)
We planted a rhubarb plant at the beginning of last year which has been growing well. I have been watering each day over these hot summer days. I have used sheep pellets and we have been eating it lately. However, the plant is healthy looking but as the leaves grow something seems to be eating them and making them like a lace cloth. It's awful. I cannot see anything under the leaves. I have seen a couple of ants running around. I have snail and slug bait out - not seen any. What is ruining the look of my lovely rhubarb plant. Please help.
25 Apr 16, Raewyn McConnell (New Zealand - sub-tropical climate)
This damage could be done by earwigs. Layer some damp newspapers nearby. Earwigs love to live between the layers. Paper can then be disposed of earwigs and all.
10 Dec 13, Gabrielle (New Zealand - sub-tropical climate)
I have a rhubarb plant that has grown lots of very large stalks with huge leaves. The stalks are red at the base but quite green for most of their length. How do I know when they are ready to harvest?
Showing 1 - 10 of 19 comments

Will rhubarb grow in Jacksonville, Florida -which is Zone 9A?

- Soo-z

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