Gadenin日本語Get the appThe shape of the year
Eucalyptus does not have the neat dormancy of a deciduous shrub. It holds its leaves year round, slows in cold weather and accelerates hard as soon as warmth returns. The work therefore clusters at the point where cold ends and growth has not yet started, and thins out to almost nothing for the rest of the year.
The table below is the whole schedule for a plant grown on a cutting cycle for its silvery juvenile foliage. A plant being grown on as a tree drops the coppicing row and adds a structural inspection instead.
| Season | Main job | Also worth doing |
|---|---|---|
| Late winter, before growth restarts | Hard cut to the stool on a 1-2 year cycle | Check ties and remove any stake left over |
| Early spring | Watch for shoots breaking on cut stools | Sow seed under cover; plant new plants out small |
| Mid spring | Thin regrowth to 5-8 strong stems | Water new plantings deeply once a week |
| Summer | Water first-year plants only; leave established ones | Cut foliage stems for the house from strong regrowth |
| Late summer | Measure and record season's height gain | Hose off honeydew and sooty mold if present |
| Autumn | Stop all feeding of container plants | Clear leaf and bark litter away from the stem |
| Early winter | Check trunk lean and soil at the base after gales | Protect first-year plants from hard frost |
Late winter: the cut that defines the plant
This is the appointment you cannot miss. Cutting the plant to a stool of four to twelve inches (10-30 cm) once the worst cold is behind you and before growth accelerates is what keeps the round silvery juvenile leaves coming and what stops the plant turning into a tall, shallow-rooted tree. Miss it two years running and the decision has been made for you.
Before you cut, look at the base. The plant needs to have been in the ground for at least a full season and to have a stem thicker than a pencil. If it is younger than that, skip this year and cut next year instead. Also check for a stake and a tie that has been left on: a tie that has bitten into a stem thickening at this rate causes real damage within a single season.
Spring into summer: managing regrowth
New shoots normally break within three to six weeks of the cut in warming weather. Once they are a foot (30 cm) tall, thin them: keep five to eight well-spaced strong stems and remove the rest at the base. Thinning early is much easier than untangling a thicket in midsummer, and it produces straight usable stems rather than a mass of thin ones competing with each other.
- Check the stools for breaking buds Walk past the cut plants weekly. Shoots appearing over the whole stump surface is the normal pattern. Nothing after eight weeks of warm weather means that plant did not have the reserves and may not return.
- Thin once, decisively At about a foot (30 cm) of growth, rub or cut out the weakest shoots, keeping five to eight. Do this in one pass rather than repeatedly nibbling at it through the season.
- Water only what needs it First-year plants get five to ten gallons (20-40 liters) weekly, second-year plants get a soak every two to three weeks in dry spells, and everything older gets nothing. Container plants get checked with a finger and watered when the top two inches (5 cm) are dry.
- Cut foliage as you want it Stems from strong regrowth can be cut for the house through summer without harming the plant. Take whole stems from the base rather than trimming tips, which keeps the plant's shape intact.
- Measure at the end of summer Record the height of the tallest regrowth and the date. That one number per year is the best guide you have to whether your cutting cycle should be annual or every second year.
Autumn and winter: mostly leaving it alone
Stop feeding container plants as the weather cools, so nothing soft goes into the cold months, and cut watering back to just enough that potted compost never dries out completely. In-ground plants need nothing at all. Resist any temptation to make a late hard cut; shoots pushed out just before frost are killed and the plant has spent reserves for nothing.
Clear fallen leaves and shed bark away from the base of the plant. Litter piled against the stem holds moisture against the bark, and damp bark at the collar is where rot starts. Everywhere else, the litter can stay.
After each significant gale, spend two minutes looking at any tall plant: has the lean changed, is the soil cracked or lifted on the windward side of the trunk, is there a fresh gap between trunk and ground. Those are the signs that a shallow root plate is starting to move, and they are far easier to act on early.
Wait to assess cold damage. Brown brittle tips in winter often stop well above where you would guess, and cutting immediately removes live wood. Leave it until new growth breaks and you can see exactly where the plant is alive.
The record that makes each year easier
Four entries a year are enough: the date and height of the hard cut, the date the first regrowth shoots appeared, the height of the regrowth at the end of summer, and any note on cold or storm damage. Written down together, those four make the whole cycle predictable rather than reactive.
The most valuable of them is the interval between the cut and the first shoots. It varies with how warm your late winter is, and after two or three years it tells you precisely how early you can safely cut on your own ground, which is the difference between a full season of regrowth and a shortened one.