The lapacho, Asunción’s calendar in flower

In August, Asunción is a city of bare trees. Then, within a week, some of those trees turn entirely pink. Not partly: entirely, without a single green leaf to break the colour.

Why the effect is so strong

The lapacho — tajy in Guaraní — belongs to a group of species that flower before producing new leaves. The plant uses stored reserves to put out the whole bloom in a few days, on bare branches, and only afterwards rebuilds its canopy.

This behaviour, which botanists call precocious flowering, explains the visual impact: with no green foliage to dilute the colour, a mature tree in flower becomes a solid block of pink or intense yellow. On streets where lapachos were planted in rows, the effect runs for whole blocks.

Pink and yellow

The two varieties most familiar in the Paraguayan urban landscape are the pink-flowered and the yellow-flowered, and they do not bloom at the same moment. Yellow tends to come first, pink follows shortly after, with a few weeks of overlap.

The lapacho is Paraguay's national tree and recurs constantly in place names, in the names of bars and businesses, in songs. Its wood is traditionally valued for hardness and durability, and its bark has uses in folk medicine — an area where it is worth being cautious and not repeating unverified therapeutic claims.

A natural calendar

In urban Paraguay the lapacho bloom works as a shared seasonal signal. It marks the end of the dry winter and the beginning of the period when temperatures climb fast. For anyone arriving from a temperate climate, where spring is a slow, gradual process, the abrupt simultaneity of the change is one of the most immediate surprises.

Intensity changes year to year. A drier winter produces more concentrated, more spectacular blooms; a wet year spreads and softens them. It is one of the few climatic variables on which, in any Asunción conversation in August, everybody has an opinion.

Where to see it

You do not need to go far. Asunción's avenues and squares hold plenty, and some historic buildings downtown are flanked by mature specimens that, in the right week, completely rewrite their own façade.

It is worth bearing in mind when planning a business trip: late August and September are not only a good climatic moment to come to Paraguay. They are also the moment when the city is, without argument, at its best.