Rhubarb Plants begin to grow at the end of the cooler months when cold temperatures have activated the new buds and crowns are usually available for sale online from July onwards.
Some rhubarb produces green stems, and other varieties produce the sought after red stems. And no you can’t make the green varieties turn red.
Grown from crowns, or corns Rhubarb dies back after the warmer months and is drought tolerant.
Rhubarb is a hardy plant and growing it is not difficult, once established rhubarb crowns, or plants will produce crops for many years. In summer it is important to provide adequate water, a lack of moisture can quickly cause the Rhubarb to wilt and collapse.
The seasons for picking rhubarb in Australia are spring and summer, this is generally when the stems are at their best and have not become to old. You can pick stems at other times depending a little on the climate.
Growing conditions to look for are a humus rich moist, but well drained soil in a sunny position. Established clumps of rhubarb plants will benefit from being divided every 3-4 years. Fertilize with a seaweed fertilizer or dynamic lifter.
Rhubarb is a hungry and thirsty plant, so follow this basic care regime for established clumps
- Mulch well in late spring, use pea straw and aged cow or sheep manure
- Water well in summer, a good deep soaking once a week
- Every second week water with a liquid seaweed solution.
Watch out for flower spikes, this is an indication that the clump is overcrowded, or it is stressed from lack of water.
Divide Rhubarb and transplant in late winter to spring.
Select the healthiest looking crowns from the clump, gently tease and pull apart retaining as much of the root system as possible and replant in a new position with some well rotted cow manure an compost dug into the soil.
- Rhubarb Plants are best divided in late winter, July to August, larger established crowns can easily be separated into a number of root or crown sections using a sharp knife.
- Simply dig up the whole crown, look for sections with 2 or 3 good buds or eyes and at least 1 leaf, and use the knife to divide.
- Replant in a freshly prepared bed with lots of compost and aged manure dug in.
- Plant with the growing eye just above ground level.
- Rhubarb crowns need dividing every 3 – 5 years to remain healthy and productive.
Water in well with a seaweed fertilizer and keep the area weed free.
Popular types in Australia include ‘Wandin Red’, ‘Silvan Giant’, ‘Ever’ and the green stemmed ‘Queen Victoria.
- Ever red rhubarb is a variety that has consistently red skinned stalks throughout the year a very sweet flavour and easy to grow
- Giant Victoria rhubarb is often grown from seed and is a prolific producer with large stems more often used for commercial production of jams and preserves. The stems are usually not as red as many varieties used for the home garden. It does have the advantage of being able to grow in part shade, however is better in full sun, winter dormant.
Remember that Rhubarb leaves and roots are poisonous, only the stem are edible.
Those tall stalks that rise from the centre of the plant, white, green and red are rhubarb flowers, and if you see them, simply cut them off as low down as possible.
As with all plants, when they try to flower and set seed they take energy from the plant and put it into the flower.
This is not what you want with rhubarb, you want new stems so that you can pick and cook them.
And believe us, rhubarb flowers are not that pretty anyway. As for collecting the seeds and using them to grow more rhubarb, remember that you are growing a cutivar, and from the seed you will not get the same plant.
Rhubarb plants or crowns are available from the following nurseries
Large range of Perennial and Border Plants including bulbs. Also Vegetable and Berry Fruits plants including, Blueberries, Currants, Raspberries and Strawberries. Rhubarb, Seed Potatoes and many other edible plants for the home garden. Visit the web site for online ordering and catalogue: