Gadenin日本語Get the appLate winter: prune and prepare
While the tree is dormant and leafless, do the year's only pruning. Take out dead and broken wood, resolve any competing leader, remove crossing branches and cut every root sucker flush at ground level. Look at the buds as you work: fat round fuzzy buds are flowers and should be left, slim pointed buds are leaves. Do not shorten shoots that grew last summer unless you are deliberately reducing the height.
This is also when you get the tools ready for pollination. Find a small soft artist's brush and a small container, and put them somewhere by the door, because the flowering window opens suddenly and lasts only two or three weeks. Check the shade screens on trees in their first two years and repair them before the weather turns bright.
Spring: flowers before leaves, and the brush
Pawpaw flowers on bare wood, before the leaves emerge, which makes the maroon bells easy to see and easy to work on. This is the most important fortnight of the pawpaw year. Every day or two, collect pollen from brown, fuzzy, fully open flowers on one tree and paint it onto the glossy green stigmas of younger flowers on a genetically different tree, then reverse the direction. Twenty to fifty flowers per tree is a realistic target.
As the flowers finish, the leaves come out, and they come out late. A pawpaw still bare when everything around it has flushed is behaving normally. Apply the spring feed as the buds break, top up the mulch to three inches (7.5 cm), and get the shade cloth over young trees before the first genuinely hot bright day.
Watch for buds that yellow and drop with a shriveled stalk during bloom. That is peduncle borer; pick the affected buds off and destroy them rather than letting them fall under the tree.
Summer: thin, water, and leave the tree alone
Fruit sets in clusters and the tree drops some of them naturally in early summer. Once the survivors reach walnut size, thin deliberately to two or three per cluster so the fruit sizes properly and the slender branches are not broken by the weight. This is worth doing even though it feels wasteful after all the pollination work.
Water is the summer job. The fruit sizes up through the hottest weeks and a tree that dries out then drops the crop. Give five to ten gallons (20-40 liters) slowly at the base in any week without meaningful rain, and check under the mulch rather than judging from the surface. Cut off all feeding by midsummer so the wood hardens before autumn. Watch the shoot tips for webbed bundles of leaves and cut any you find out immediately.
| Season | Main jobs | The decision to get right |
|---|---|---|
| Late winter | Prune, remove suckers, check shade frames | Leave the round flower buds on last year's wood |
| Spring, at bloom | Hand pollinate daily, spring feed, mulch | Move pollen between two genetically different trees |
| Late spring | Shade cloth up on trees in years 1-2 | Screen before the leaves scorch, not after |
| Early summer | Thin clusters to 2-3 fruit | Thin once the fruit reaches walnut size |
| Midsummer | Deep watering, stop feeding | Never let the tree dry out while fruit is sizing |
| Late summer to early autumn | Pick over the tree every day or two | Judge ripeness by give and smell, not color |
| Autumn | Rake leaves, top up mulch, wrap young trunks | Do not prune now; wait for dormancy |
| Winter | Nothing, tree is fully hardy | Resist tidying; plan next winter's cuts |
Late summer to autumn: the harvest window
The first fruit softens in late summer and ripening runs on for two to four weeks, with fruit on the same branch ripening days apart. Walk the tree every day or two. A ripe pawpaw yields to gentle whole-hand pressure and smells sweet from a foot (30 cm) away; color barely changes and blotchy skin is normal. Lift and twist rather than pulling, carry the fruit in a single layer, and collect windfalls the same morning they drop.
Ripe fruit lasts two or three days on the counter and about a week refrigerated, so process as you pick. Scoop the pulp, remove the large brown seeds, and freeze it flat in measured portions. If you want seed for raising new trees, keep it damp from the moment you take it out of the fruit and never let it dry, because dried pawpaw seed is dead seed that looks perfectly normal.
As the leaves turn clear yellow and drop early, rake and remove them if the summer was wet and leaf spot was bad. Top up the mulch, wrap the trunk of any young tree against winter sun scald, and put the tools away. There is nothing to do again until late winter.
Keep a one-page record for the season: bud break, first flower, number of flowers hand pollinated on each tree, first ripe fruit, last ripe fruit, and total fruit picked. Pawpaw timing shifts by weeks between years, and this record is what turns guesswork into a routine after two or three seasons.