Gadenin日本語Get the appThe shape of the year
A flowering dogwood asks for work in short bursts and wants to be left alone the rest of the time. The bursts are: dead wood removal in dry dormant weather, mulch and any shaping in late spring right after the bracts fall, steady watering through late summer while next year's buds are being made, and leaf clearance in autumn.
Everything else is observation. Once you know that the fat rounded buds visible all winter are next spring's flowers, and that the small pointed ones are leaves, the winter tree stops being a bare shape and becomes a forecast you can read.
Use the table as the frame, then adjust to your own climate. Seasons here mean what the tree is doing rather than months, because a dogwood in a mild climate and one in a cold climate run the same sequence weeks apart.
| Season | What the tree is doing | Your jobs |
|---|---|---|
| Late winter | Dormant, flower buds visible at branch tips | Count buds, remove dead twigs and trunk shoots in dry weather |
| Early spring | Bracts open on bare wood, before the leaves | Nothing but watching, no pruning, no feeding |
| Late spring | Bracts drop, leaves expand, growth begins | Top up mulch, do any shaping cuts, start watering routine |
| Early summer | Active shoot growth, leaves fully out | Water deeply in dry spells, remove trunk shoots |
| Late summer | Flower buds for next spring are being set | Keep watering, stop all shaping cuts, watch for mildew |
| Autumn | Red fruit ripens, leaves turn red-purple and fall | Rake and remove every fallen leaf, one deep soak if dry |
| Early winter | Fully dormant | Check the trunk base under the mulch, review your notes |
Late winter: look before you cut
Start the year with a slow walk round the tree while the structure is bare. Look at the branch tips against the sky and separate the plump, flattened, rounded flower buds from the narrow pointed leaf buds. A good count means the display is already secured. A poor one means last summer was the problem, and there is nothing you can do about this spring.
Then look for dead leaves still hanging on the twigs. Healthy dogwoods drop their leaves cleanly, so leaves clinging through winter mark wood infected with anthracnose. Note where they are, and cut those twigs back into clean healthy wood during a dry spell.
Pull the mulch back from the trunk and inspect the bark all the way round for wounds, sunken cankers and sawdust-like frass. Then put the mulch back with a clear gap around the bark. Do no shaping now: the sap is rising, cuts bleed heavily, and the buds you would cut are the ones you are waiting for.
Spring: the bloom, and the work that follows it
The bracts open on bare branches before the leaves, starting small and green and expanding to full white or pink over a week or two. The display holds for two to four weeks and lasts longer in a cool spring. A late frost can brown the bract edges or take the display entirely; there is nothing to do about it and no treatment to apply.
The moment the bracts drop, your working window opens. Top up mulch to two or three inches (5 to 8 cm) across a ring at least as wide as the canopy, keeping it clear of the bark. Make any shaping cuts you have decided on, choosing a dry spell. If the tree needs feeding at all, a light balanced slow-release feed now is enough for the year.
This is also when the watering routine starts. New leaves and expanding shoots are drawing hard on a shallow root system, so a dry late spring does more damage than the calendar suggests. Water at the base, in the morning, never overhead.
Summer: water, and watch the leaves
Through early summer, keep about one inch (25 mm) of water a week reaching the root area during dry weather and check with a finger three inches (8 cm) down just outside the canopy edge. Brown, dry leaf margins with green centers are scorch and tell you what last week was like; they will not heal, so read them as feedback rather than a problem to cure.
Late summer is the part of the year most people neglect and it matters most, because this is when next spring's flower buds are formed. A tree allowed to run dry now will look fine in autumn and disappoint the following spring. Keep watering right through until the leaves start to turn.
Watch the foliage as the season goes on. A white dusty film on the upper leaf surface is powdery mildew, common and rarely fatal; improve air movement and keep the tree watered. Tan blotches with purple rims, particularly low in the canopy, are the serious disease and mean you should be planning to improve light and air flow and to clear every leaf in autumn. Also stop all shaping cuts from midsummer onward, and go on rubbing off shoots on the trunk whenever they appear.
Autumn: fruit, color and the clean-up that counts
Clusters of glossy red fruit ripen as the leaves turn deep red-purple, and birds will strip them quickly. Nothing needs doing about either. If the tree fruited very heavily this year, expect a slightly lighter bloom next spring; that alternation is normal and self-correcting.
The one autumn job that genuinely changes next year is raking. Fallen leaves are where anthracnose overwinters, so clear the whole area under the canopy after leaf fall and take the leaves away rather than leaving or composting them on the spot. Do it thoroughly and do it every year, because half a job leaves most of the inoculum in place.
If autumn is dry, give one deep soak before the ground freezes. A shallow-rooted tree going into winter dry is far more likely to show damage in spring.
Winter: inspect, and write it down
With the tree fully dormant, do a proper inspection: bark around the base under the mulch, the branch structure for crossing limbs to deal with later, and the twigs for dead leaves that mark infected wood. This is the calmest and clearest view of the tree you will get all year, so use it deliberately rather than glancing at it in passing.
Then sit down with your notes. The records that matter for this species are short and specific: the date the bracts first showed white, the date they dropped, every deep watering through late summer, the date you first saw leaf blotches or mildew, the count of trunk shoots you removed, and a heavy, moderate or sparse rating for the winter bud count.
Read them together and the pattern for your particular tree appears within two or three seasons. You will know how many dry days it takes before it scorches, whether disease turns up every year or only in wet springs, and whether the summer you gave it produced the spring you wanted. That is the whole point of keeping them.