Split a Rhubarb Victoria Crown into 4 Sections with a Spear and Jackson Border Spade

A dormant Victoria crown lifted in late autumn or in February gives the cleanest division. The buds, usually called eyes, sit pink and swollen on the crown surface. Each of the four pieces needs one or two of those buds and a solid part of the woody storage root underneath.

Wait until the leaves have died back completely. A crown cut during active growth in June is full of soft tissue and sap, and the wounds can rot before new roots take hold. Dormant wood behaves better under a blade: it is firmer to cut, and you can actually see where the growing points sit without a mess of sap clouding the view.

Lift the crown before deciding the cuts

The Spear and Jackson Neverbend border spade is a good size for this job because its blade is about 22cm wide. A standard digging spade is closer to 28cm, which covers too much crown when the buds are close together. The narrower blade lets you choose a line between growing points and put force exactly where the split needs to open.

Its forged head also matters. If the crown is dense, the tread can take a tap from a mallet without denting. That allows a firm, vertical cut through old rhubarb wood without twisting the blade or tearing the crown apart by hand.

Lift the clump whole before you try to divide it. Work around the plant with a fork, loosen the soil, then lever the crown out as one piece. Shake off loose soil so the buds and root plates can be seen clearly.

Turn the lifted clump under good light and look at the underside as well as the top. A well-fed three-year Victoria often shows three to five natural divisions, where separate growing points have already formed their own root plates. Use those existing divisions as your guide. A forced equal split through one tight growing point gives weak pieces, even if the sections look neat on the bench.

Plan all four cuts across the crown before the blade touches it. The best section is large enough to sit in two cupped hands, has at least one fat bud, and carries enough root to sustain growth in spring. The cut root face should look pale, fresh, and cleanly sliced. A centre lump that is woody, hollow, brown, and budless has usually finished its productive life.

Make the cut with one steady downward drive. A hesitant push bruises tissue and leaves ragged wounds where rot can start. If the blade stops halfway, keep it upright, tap the tread, and finish the line already chosen.

Leave the cut faces bare. Rhubarb heals best after a few hours of dry air around the wounds, and there is no need to cover them with anything.

Planting depth and spacing

Set the four divisions 90cm apart. The top bud should sit just proud of the soil surface, with no deeper planting, because buried buds are prone to rot.

A spadeful of well-rotted manure worked into the base of each autumn planting hole gives the new division enough food for its first season. Rhubarb is a heavy feeder and draws strongly on nitrogen during spring growth.

Water from a butt, then soak properly

A crop grown for stems depends heavily on water. In a dry June, a mature Victoria loses a large amount of moisture through its broad leaves, and newly divided crowns have a smaller root system at the very point when they need to rebuild.

Harvested rainwater suits rhubarb well. Water from a butt fed by a shed or greenhouse roof carries none of the lime that hard tap water can add to soil over years. Even a modest run of roof collects a surprising volume once you total up the rain across a month, so a butt kept topped up will usually cover four new divisions through a dry fortnight without recourse to the tap.

Raise the butt on blocks high enough to slide a watering can under the tap. Fit a diverter so the first flush of roof grime passes by the store before cleaner water enters the butt.

Give the bed one deep soak each week in dry weather. Water that reaches well below the surface encourages the new roots to work down into cooler soil. A shallow daily splash wets only the top 2cm and leaves the root zone vulnerable during the first hot spell.

Feed the crown, not the acid-loving bed next door

Victoria rhubarb wants rich soil with a near-neutral to slightly acidic reaction, roughly pH 6.0 to 6.8. It also wants a steady supply of organic matter. Garden compost and rotted manure fit that need well.

Ericaceous compost is the wrong bag for this crop. It is blended for blueberries, cranberries, and other lime-hating plants that prefer pH 4.5 to 5.5. Using it on rhubarb because it is already open in the shed pushes the soil more acidic than the plant wants and can lock up nutrients the crown needs for strong leaf and stem growth.

In early spring, add a 5cm collar of compost around each division. Keep that mulch a hand’s width away from the emerging buds so the crown itself does not sit wet. The mulch feeds the soil and helps hold moisture, while the gap around the bud reduces the damp pocket where rot begins.

A high-nitrogen top dressing, such as pelleted chicken manure, can be used at the rate printed on the sack. Applied during the main push of growth, it supports the leaf and stem expansion through April and May. Stop feeding by midsummer. Late nitrogen produces soft growth that enters winter poorly.

The same principle explains why the old centre of a crown is often discarded during division. The productive tissue sits toward the outside, where newer buds and roots have formed. Keeping only the most vigorous outer pieces gives the replanted bed the strongest start.

Harvest restraint after division

Do not pull stems from a freshly divided crown in its first spring. Everything the plant makes that year goes into recovery. Stored energy is spent sealing the cut faces and pushing fresh roots into the surrounding soil, and whatever leaf the crown manages to unfurl is working to rebuild the reserves it will lean on next year. Strip stems now and you take that fuel away.

In the second year, a light pull of two or three stems is defensible if growth is strong. Full harvesting belongs to the third year. Pulling too early from a new division is the common reason a split rhubarb bed stays weak for years after the work was done.

Through the first season, steady leaf expansion from the exposed buds is the useful sign. Most of the recovery stays hidden below the mulch, which leaves the grower guessing at how much root a given piece has actually rebuilt before the second spring reveals it.