•
Plant in full sun in fertile, well-drained, slightly acidic
soil. Plants can grow more than three feet (90 centimetres)
tall with a spread of four to five feet (120 to 150 centimetres)—take
this into account when deciding where to place them.
•
Dig a hole 11 inches to two feet (45 to 60 centimetres)
deep and two feet in diameter. Add six inches (15 centimetres)
of compost or well-rotted manure. Fill with a mixture of
soil and compost, leaving a depression for the crown. Set
the crown in the hole, and cover the buds with one inch
(2.5 centimetres)—no more—of soil. Water well; mulch with
a mixture of compost and straw, hay or shredded leaves to
a depth of six inches (15 centimetres), leaving a space
in the centre so the crown is uncovered.
•
Keep the soil moist but not soggy. Feed midsummer with a
layer of compost around the crowns, or a granular organic
fertilizer. If your soil is poor, feed every two or three
weeks with compost tea (made by soaking a bag of compost
in a pail of water overnight).
•
Remove flower stalks as they appear. In fall, remove dead
leaves, fluff up the mulch and lay an inch of new mulch
over the crown; use six to eight inches (15 to 20 centimetres)
in extremely cold climates.
•
In spring, draw back the mulch, dig in compost or well-rotted
manure and granular organic fertilizer, and replace the
mulch, avoiding the crown.
•
Don’t harvest stalks the first year—plants need to devote
their energy to developing a good root system. During the
second year, harvest only a few stalks during the first
two weeks of the season. In subsequent years, harvesting
can continue for eight to 10 weeks.
•
Choose stalks that are at least a foot (30 centimetres)
long. Grasp the stalk in your hand, slide your thumb down
the inner groove as far as it will go, then twist the stalk
while pulling up. Take fewer than half the stalks per plant
in each picking.
•
Rhubarb leaves can be composted but should never be eaten—they
contain high amounts of oxalic acid.
•
To prevent disease, keep your garden well weeded and do
a good fall clean-up. Remove leaves that wilt, turn yellow
or have watery spots on them. If the entire plant shows
signs of wilting or disease, remove and destroy. Plant new
crowns in another location.
• After five to 10 years—earlier if
the plant starts producing small, tough stalks instead of
large, juicy ones—the crown needs dividing. Divide in early
spring before the shoots emerge. Dig up the crown and cut
off large side roots. Using a spade, divide the crown into
pieces, making sure each piece has roots and at least two
buds. Replant as you would a new crown.