August ripens gradually in Gozo, and the roadside hawkers announce it before the calendar does. Their stalls line the country roads and carry sunset-coloured fruit fresh from the fields. Some enthusiasts peel the prickly pears before the morning trade starts. Neat plastic containers of peeled fruit now sit beside the traditional spiny heaps. The spines guard the stock, the price stays modest, and everyone drives away happy.

The season spills beyond the stalls, into kitchens and freezers across the Gozo. Grandmas boil the surplus into jam against the winter, beside the last figs. Some visitors take a chance and stop by a solitary field full of ripe pears. They take some pears with borrowed confidence and later peel their rewards carefully. The entire exchange runs on a scale that no supermarket bothers to understand. No one gets wealthy from prickly pears, and everyone involved appears happy with that.

The prickly pear looks as Gozitan as limestone, yet it arrived here as an immigrant. Botanists trace Opuntia ficus-indica to Mexico, where farmers cultivated it long before Columbus sailed. Within a few generations of that first crossing, Spanish traders transported the plant across the Atlantic. It found our climate to be pleasant, our farmers hospitable, and our rubble walls easy to coexist with. Within three centuries the newcomer had rooted itself into island life as deeply as the bell towers.

In 1975, shortly after Malta's transition to a republic, Dom Mintoff's government designated the prickly pear as its official symbol. The new national emblem showed a prickly pear standing on a shoreline, plain and unheraldic. That humble design endured until 1988, when heraldry returned with its shield and mural crown. For 13 years, then, a Mexican cactus represented the Maltese state to the world. An island that now frets about newcomers once put one on its coat of arms. The plant earned that honour the slow way, by feeding people and asking little.

The plant in Gozo still works hard for its keep, unlike most living things. Farmers plant it along field boundaries, where it stands in for the rubble wall. It breaks the wind, shades the soil, deters trespassers, and fruits every August without complaint. A mature tree climbs to five metres and outlives the farmer who planted it. Our grandparents raised boundaries that feed people; we now pour boundaries in concrete that feed nobody. Each living wall on the island silently poses that question to every development proposal.

Walk the lanes between the villages in late August and count the boundaries. The green paddles rise above the honey-coloured stone, heavy with ripening fruit. Swallows use the tallest plants as watchtowers, and lizards patrol the shade beneath. The hedges cost nothing to maintain and pay their rent every single summer. No landscape consultant ever designed anything half as useful or half as beautiful. However, rapid development now removes these living barriers quicker than they can be replaced. Every new access road and boundary wall erases another line of evergreen sweetness.

Maltese refuse to give this fruit a single name, and the refusal reveals deep affection. We call it bajtar tax-xewk, the prickly pears, and then we keep naming. L-abjad, l-isfar and l-aħmar sort the fruit by colour on every hawker's stall. Tax-xitwa ripens between October and December, stretching the season into the first winter rains. L-Ispanjol carries large reddish fruit, and the lanġasi borrows the shape of a pear. A language only builds a vocabulary around the things its speakers truly love. The instinct that gave every villager a laqam (nickname) gave every fruit a name too.

The harvest itself follows rules that every Gozitan child learns once, and learns painfully. At dawn, you pick before the heat loosens the glochids, those invisible hairs that torment. You reach with tongs, folded newspaper, or a practised flick that grandfathers demonstrate with gusto. You chill the fruit in a bucket of water and peel it with knife and fork. Bare fingers avoid touching the skin, whatever confidence the tourists bring to the attempt. The reward tastes of watermelon and honey, cool as a cellar and sweet as August.

Old Gozo also kept the plant in its medicine cupboard, not just its kitchen. Households used the pads against stomach aches, bone pain, inflammations and insect stings. Modern laboratories now extract compounds from the plant for cosmetics and food supplements. The remedies changed their packaging, but the confidence behind them never moved. A plant that heals, feeds, shelters and fences earns a permanent place in any village.

The plant once tempted Maltese investors with a stranger harvest than its fruit. Victorian-era speculators reportedly farmed cochineal insects on local prickly pears to produce crimson dye. Oaxacan growers had built fortunes on that trade, and imitators sprouted across the Mediterranean. The Maltese venture never flourished, and the islands went back to eating their cactus instead. History sided with the fruit, as Gozitan history usually sides with whatever endures.

Sicily demonstrates what a creative kitchen can achieve with that same plant. Sicilian producers turn prickly pears into granitas, sorbets, candies, jellies and elegant restaurant desserts. Malta answers with bajtra, the pink liqueur that local distillers now bottle with pride. The liqueur shows what happens when islanders take their own harvest seriously. For an economy chasing quality tourism, that gap looks like money lying on the ground. The unprocessed material thrives freely on every field's edge, requiring only creativity. A Gozitan prickly pear sorbet will sell itself to every visitor on the Mġarr ferry.

One shadow now creeps across the Mediterranean towards this simple, unguarded abundance. A scale insect, Dactylopius opuntiae by name, reached Israel in 2013 and Morocco in 2014. It smothers prickly pears under a white wax and kills whole hedgerows within seasons. Across most Mediterranean countries, entomologists now consider it the primary pest of prickly pear. Nobody has yet confirmed its arrival in Malta, and our plant health authorities must keep matters so. Vigilance at the ports costs little; replacing three centuries of living walls costs everything. An island that once put this plant on its emblem owes it that much.

So stop at the next roadside stall and buy a dozen, peeled pears. Chill them deep, and savour them slowly in the evening cool. Every August the spiny immigrant repays three centuries of hospitality, with generous interest. The plant now belongs to our heritage and culture as surely as the citadel walls. Gozo owes it protection, and honest attention, before the bulldozers finish the argument. Sweetness, on this island, has always known how to look after itself; we should still help.