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TREES AND SHRUBS
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HOW TO CARE FOR
Rhubarb must be one of the strongest growing vegetables because if water logging is avoided it can survive in almost all positions and soils in the cool UK weather. See the picture below of a rhubarb plant which was in our garden when we moved in. Totally overrun with weeds it still stands out as a healthy looking plant with lots of juicy stems ready for picking.
However, even just a little care will pay dividends with a slightly earlier crop
and even more healthy stems. Follow our minimal care plan for rhubarb and you
could be displaying the stalks at your local garden show!
If you grow your rhubarb in semi-shade and mulch (see below) each spring their should be almost no need for watering your rhubarb. In very prolonged and dry weather, or if your rhubarb is planted in full sun, the occasional thorough drenching with water will be all that is required.
We regularly weed around our rhubarb (see below for an example of how not to grow rhubarb) and this is a good idea because once weeds start growing around the base of the plant they are very difficult to remove.
Feeding in Spring and Autumn with a long lasting organic fertiliser such as blood, fish and bone or bonemeal (two good handfuls sprinkled around each plant) will be sufficient. If you have any well rotted manure then spread a layer around the plant but far enough away so as not to touch any emerging stalks.
Frequently, rhubarb plants will produce flower heads (click the picture below to see one clearly) and these are best removed by simply cutting the stem below them.
Mulching your plants in spring around the second week of May will conserve moisture in the soil and also help to prevent the growth of weeds. In winter when the plant has stopped growing, remove the remaining stalks and leaves and put them on the compost heap.
Forcing rhubarb is a troublesome procedure which gives you fresh rhubarb about three weeks earlier compared to normal rhubarb. It requires you to go out in the freezing cold of February and tend to your rhubarb to force it to produce a crop far earlier than it would normally. Who on earth would do do that you may ask, why not wait three weeks longer for the normal crop? But gardeners are strange and competitive individuals who just love to get one up on their neighbouring gardeners.
If that's sold to you the benefits of forcing rhubarb then here's what you must do. When your plant begins to show signs of life (normally end of January to early February), cover it with something which traps in warmth and excludes light - a large bucket will do or maybe, if money is no object, a purpose made rhubarb forcing pot which will be available at most garden centres. Cover the container with straw, compost or anything which will keep the warmth within.
Keep a watch on the rhubarb every week or so and you will find that within three to four weeks of placing the cover on top you will have a crop of delicate and sweet stalks. This process weakens the plant so leave a forced rhubarb for two to three years before forcing it again.
First, what not to do! Don't harvest rhubarb in the first year of its life and go easy during the second year. The reason is that the plant will be building up its strength and removing the stalks will also remove the leaves - these are its source of strength.
Next, don't eat the leaves because they contain oxalic acid which is poisonous.
Aside from that you are safe to do what you want with your rhubarb plant. To harvest individual stalks don't cut them off, this can introduce infection. The best way is to grip a stalk near the the base, twist slightly and pull outwards in one motion. Harvest in your area normally begins in the the second week of March.