Posted on by tonytomeo

Plum

Plums are now ripening for summer.

Prunes are not merely dried plums. They are European fruits which, although very edible fresh, are also popular for drying. Their significant sugar content inhibits mold during the drying process. Plums, Prunus domestica, are of the same species, but are of Japanese origin. They are quite popular fresh, but are more likely to mold than dry like prunes can.

Besides their lower sugar content, plums are a bit bigger and rounder than most prunes. Prunes are ‘freestone’, so their flesh separates from their seeds when ripe. Old fashioned plums are ‘clingstone’, so their flesh adheres to their seeds when ripe. The most popular plums are maroon or purple. Others are red, yellow, orange, green, blue or almost black.

Almost all plum trees within home gardens are semi dwarf. Although they do not grow as big as orchard trees, they can grow twenty feet tall. They require specialized aggressive dormant pruning during winter. Otherwise, they become shabbily overgrown with most of their fruit out of reach. Their prolific and bright white bloom is spectacular for early spring.

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Feral Plum

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Feral plum naturalized from understock cultivars.

Springtime in the Santa Clara Valley was famously spectacular decades ago, when vast orchards occupied what is now only urban sprawl. Tourists came to see it like some still go to see foliar color of autumn in New England. Most of the orchards were for stone fruits. Only a few in cooler spots were for apples and pears. Only orchards of English walnuts did not bloom colorfully.

Cherry and almond trees typically bloomed first. Prune trees bloomed immediately afterward. Apricot trees were only a few days later. Of course, the schedule of bloom was variable. Prune trees often bloomed just after apricot trees. Various cultivars of cherry started to bloom at slightly different times, even though those that needed to pollinate each other managed to do so.

After the main bloom of all the stone fruits, and after the tourists were gone, the few apple and pear orchards in cooler spots and surrounding hillsides continued the process. Mulberry trees that grew sporadically on roadsides around the orchards bloomed no more colorfully than English walnuts, but somehow produced enough fruit to distract birds from developing stone fruits.

Feral plum trees are a group that was not easy to categorize even before the demise of the orchards. They were not intentionally grown in orchards, or even in home gardens. They just sort of grew wild along creeks or from the roots of grafted stone fruit trees that had been cut down. They were originally grown as understock cultivars, but had naturalized to become truly feral.

Because their fruit was not used for much, they did not get much consideration. We tend to forget that some types bloomed before any of the other stone fruits. To those who do not expect fruit, feral plum trees are as spectacular as productive stone fruit trees.

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Feral plum bloom is now finishing. Foliage will replace blossoms.

Posted on by tonytomeo · 10 Comments

Enjoy The Fruits Of Summer

70726thumbIs a prune really just a dried plum? No! A plum is really a prune. In fact, all ‘stone fruit’ are of the same prune genus known as Prunus. This means that apricot, cherry, peach, nectarine, prune, plum and even almond are all related. So are all their weird and trendy hybrids, such as aprium, pluots, plumcots and so on. (Almonds are the pits or ‘stones’ of dry leathery fruits that fall away as hulls.)

The main difference between prunes and plums is that prunes contain enough sugar to inhibit mold while they dry, . . . if they dry efficiently enough. Plums are juicier and contain less sugar, so are more likely to mold before they dry. If dried in a dehydrator, plums get squishy, and are likely to develop an odd flavor. Most prunes are European. Most popular plums are of Japanese descent.

The wrinkly and leathery fruit that most of us know as prunes are actually ‘dried’ prunes. Fresh prunes can be eaten just like plums, but are firmer, and have milder flavor. They are better for juicing, canning (whole, while firm) and cooking, although plums make better jam. Plums have richer flavor for eating fresh. Because they are so soft, they do not juice as well, but make nice plum nectar.

Apricots are not quite as easy to dry as prunes are. They must either be dried quickly in a dehydrator of some sort, or sulfured; and sulfuring is probably too much work for most of us. Most of the apriums, pluots, plumcots and other weird apricot hybrids that have become so trendy in the past many years are too soft for drying or canning. Like plums, peaches and nectarines, fresh is best.

Fruit that ripens evenly throughout the tree is best for canning, freezing, drying or any technique that takes large volumes of fruit at once. Uneven ripening is better for fruit eaten fresh. It allows later fruit to continue ripening while the earliest fruit is being consumed. The problem is that the best stone fruits ripen very evenly, all at the same time. If not shared with neighbors, some is sure to rot.

If some of the fruit ripens later than the rest, it will be inside the shadiest part of the canopy. The most exposed fruit on the exterior of the canopy ripens first, and for most types of fruit, has the best flavor. After all fruit is harvested from a tree, any remaining bad fruit should be removed from the tree, and from the ground around the tree. Diseases proliferate, and later overwinter in rotting fruit.