I cactus, la primavera che non arriva e la pioggia che non dà tregua: dobbiamo preoccuparci?

Una primavera che stenta ad affermarsi, temperature che oscillano in continuazione con giornate soleggiate e molto calde e giornate uggiose col termometro in picchiata. Soprattutto, pioggia fitta quasi tutti i giorni da almeno una settimana, quantomeno qui al Nord. Molti, tra noi, hanno già trasferito le loro cactacee e succulente all’esterno, o hanno tolto le protezioni invernali (tessuto non tessuto o teli trasparenti). In tanti si preoccupano, alcuni corrono ai ripari riportando le piante al coperto, altri sono indecisi sul da farsi… E’ davvero il caso di preoccuparsi per la combinazione tra basse temperature e pioggia insistente?

Ecco in questo articolo qualche riflessione e la risposta alla domanda che in tanti mi state ponendo in questi giorni, come sempre sulla base di quello che ho imparato in anni di coltivazione (…).

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Quando il cactus “esplode” per la troppa acqua: come evitare le spaccature sul fusto

Le piante succulente, e le cactacee in particolare, si sono evolute per accumulare riserve idriche e riuscire così ad affrontare lunghi periodi di siccità. Nei loro habitat naturali, i cactus sono soggetti a forti sbalzi di temperatura tra la notte e il giorno, ma anche ad un’alternanza tra periodi di totale siccità e periodi di grande disponibilità di acqua.

Nelle regioni subdesertiche degli Stati Uniti meridionali (California, Arizona, Texas, Nevada, ecc.), così come in Messico, nell’America centrale e nell’America latina (Cile e Argentina, ad esempio), durante la stagione vegetativa, corrispondente di fatto alla primavera e all’estate, le giornate calde e secche sono spesso interrotte bruscamente da violenti acquazzoni. (…)

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