Cultivated for its great , attractive leaves and tall panicles of flowers . This coinage is perennial and acquire from a rhizome , although it also has a Brobdingnagian rootstock . Do not deplete leaves . They can be poisonous if ingested . leave of absence are palmately lob , round to widely ovate , dark red , coarsely toothed , to 36 inches in length . Underside of folio has subdued hair . Flowers are dark crimson , small , lead - shaped , numerous . Panicles are erect to more or less pendant and achieve up to 6 feet tall . Grows to 8 understructure tall and 6 feet blanket . aboriginal to N.E. Tibet and N.W. China . plant life in hoummos - rich , damp soil and mulch per year with compost . For extra selective information on rhubarb , see our article on Rhubarb .
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Characteristics
Requirements
Plant Care
Fertilizing
Light
Watering
Planting
The best times to plant are natural spring and fall , when filth is practicable and out of danger of frost . Fall plantings have the advantage that etymon can prepare and not have to vie with developing top growth as in the bounce . Spring is more suitable for perennials that dislike smashed conditions or for cold areas , allowing full organization before first winter . Planting in summertime or winter is not advisable for most works , unless imbed a more established sized works .
To plant container - grown plants : Prepare planting holes with appropriate depth and space between . irrigate the plant thoroughly and allow the redundant urine drain before cautiously removing from the container . Carefully undo the root formal and come in the plant life in the yap , work soil around the root as you take . If the flora is highly antecedent bond , separate roots with fingerbreadth . A few slits made with a pocket tongue are fine , but should be kept to a minimum . Continue filling in territory and water exhaustively , protect from direct sun until stable .
To plant spare - root works : Plant as soon as possible after purchase . Prepare suitable planting holes , spread roots and work soil among antecedent as you fill in . Water well and protect from unmediated sun until stable .
To plant seedlings : A identification number of perennial develop ego - sow seedlings that can be graft . You may also get down your own seedling seam for transplant . Prepare suitable planting holes , spacing appropriately for plant development . softly swipe the seedling and as much fence in dirt as potential with your garden trowel , and replant it immediately , firm soil with fingertip and water well . Shade from direct sun and water regularly until static .
Problems
Prevention and Control : engraft resistant varieties and provide maximal gentle wind circulation . Clean up all rubble , specially around plants that have had a trouble . Do not water from overhead and water only during the day so that works will have enough time to dry before night . Apply a fungicide labeled for rust on your flora . disease : Southern BlightPlants with Southern blight have lesions on the stem at , or penny-pinching , the soil assembly line . These lesions develop rapidly , gird the radical and lead in a sudden and lasting wilt of the plant . gamey temperatures ( above 85 degrees F , 29 degree C ) favor the disease . The fungus attacks a wide mountain chain of plants and subsist for long periods in soil . To control , address with a recommended antifungal accord to label counsel .
