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Dianthus Through the Year: What to Do in Each Season

A season by season plan for pinks, built around the two jobs that matter most: shearing and taking cuttings in summer, and keeping the crown clear and dry from autumn through winter.

The shape of the year

Growing pinks well is not a matter of constant attention. There are perhaps six moments in the year when what you do makes a real difference, and long stretches in between when the correct action is to leave the plant alone. Knowing which moments those are is most of the skill, because the common failures all come from doing the right thing at the wrong time: feeding in summer, cutting back in autumn, mulching in winter.

The year turns on two hinges. The first is midsummer, immediately after the main flush, when you shear the plants over and take cuttings. The second is autumn, when everything organic must come off the crowns before the wet season sets in. Get those two right and the rest of the calendar is a matter of watching.

SeasonMain jobAlso worth doingDo not
Early springCheck crowns for winter rot, cut out dead tissueOne low-nitrogen feed, top up grit around the matsDo not mulch with compost or bark
Late springWatch for slug damage on new shootsPlant out last year's cuttings; stake nothing, pinks stand aloneDo not feed again
Early summerDeadhead to a leaf joint every few days through the flushWater new plantings only; note first flowering date and scentDo not water established plants routinely
MidsummerShear the whole plant back by an inch (2.5 cm)Take cuttings from non-flowering shoots; peg down layersDo not cut into old woody growth
Late summerPot up rooted cuttings, look for a second flushLift and separate self-layered piecesDo not shear again after this point
AutumnClear leaves and mulch off every crownPlant new stock; divide young clumps; raise pots onto feetDo not cut plants back hard
WinterKeep crowns uncovered; sweep off debris after stormsMove containers to the driest sheltered spotDo not water pots except in prolonged dry cold

Spring: assess, then leave alone

The first job of the year is an inspection rather than a task. Part each mat with your fingers and look at the center. Green and knitted means a healthy plant. A soft brown patch means winter rot, and every scrap of dead tissue should come out at once so moisture stops sitting against the living shoots around it. Bare woody stems with growth only around the rim means the clump is ageing and belongs on the list for cuttings in summer.

After that, one low-nitrogen feed as growth restarts is all the plant should get for the whole year, and on decent lean soil you can skip it. Top up the grit around the outside of each mat, keeping the center open. Then stop. Spring is when a well-meaning gardener does the damage that shows up next winter, usually by tucking compost around the collar or by feeding generously and producing soft growth.

Last year's rooted cuttings go out in late spring, once the ground has warmed and the risk of prolonged wet has passed. Set them at the same depth they grew at in their pots, never deeper, on a slight rise, and put grit around them straight away.

Summer: the two jobs that matter

Through the main flush, deadhead every few days by cutting each spent stem back to a leaf joint rather than pinching off the flower. Done promptly on an actively growing plant, this is what produces the second flush; done late, after the plant has begun to slow for summer, it produces very little.

When there is more spent stem than flower left, switch from deadheading to shearing. Take the entire plant down by about an inch (2.5 cm) with shears, cutting only into leafy growth and never into old wood, which will not break again. The plant responds by branching low and thickening the mat.

At the same time, take cuttings. Non-flowering side shoots four to five inches (10 to 13 cm) long, pulled sharply from a leaf joint, struck in a gritty mix in bright shade, will root within three to five weeks. Take a batch from any clump that is three years old or more, and from anything strongly scented that you would be sorry to lose. This is the single job that keeps a collection alive across decades, and it takes twenty minutes once a year.

  1. Deadhead through the flush Cut each finished stem just above a leaf joint, working over the plant every few days. Prompt cutting on growing plants is what drives reflowering.
  2. Shear when the flush ends Take the whole mat down by an inch (2.5 cm), staying in leafy growth. Clear the clippings off the crown afterwards rather than letting them sit.
  3. Take a batch of cuttings Pull non-flowering shoots at a joint, strip the lower leaves, and insert into half compost and half sharp sand. Label them with the parent plant.
  4. Stop cutting by late summer Leave the last flowers standing. Growth pushed out late in the season goes into winter soft and is exactly what rots at the crown.

Autumn and winter: keep the crown open

Autumn is when pinks are lost, though the damage does not show until spring. Fallen leaves drift into the mats, neighboring perennials collapse across them, and a general mulch gets spread over the border. All three hold moisture against the crown through the wettest months of the year, and the plant rots from the collar upward. Clear leaves off the mats whenever they gather, cut back anything leaning over them, and mulch with grit rather than anything organic.

New plants can go in during autumn where winters are mild and drainage is genuinely sharp, since the ground is still warm and roots establish before growth starts. On heavy ground or in a wet climate, wait for spring instead; an autumn planting on cold wet soil rarely takes.

Through winter, the work is negative: do not cut back, do not feed, do not water plants in open ground, and do not cover anything. Raise containers onto feet so they cannot stand in water, and move them to the driest sheltered spot rather than the warmest. Sweep debris off the mats after storms. Pinks are hardy well below 0F (minus 18C) when dry, so cold is not the thing to protect against.

If you are tidying a border in autumn and reaching for the mulch, walk past the pinks. A grit collar around the outer edge with the center of the mat left completely open is the correct winter treatment, and organic mulch over the crown is the most common cause of losses.

The record that makes next year easier

Four dates per plant per year are enough: first flower, the day you sheared it, the day the second flush opened, and the day you took cuttings. From those you learn the interval between shearing and reflowering on your own site, which varies more with local summer heat than any general figure, and you learn how long cuttings take to root for you.

Alongside the dates, keep the position of each clump and the year it was planted, plus a one-word note on scent judged at midday in warm still weather. Three years on, that record answers the only two questions that matter: which mat is old enough to need replacing, and which one is worth propagating rather than letting go.

Read next

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