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Turning hydrangeas pink or blue by changing soil pH? Now wait a minute, I hear you saying. You've told us in other articles that turning hydrangeas pink or blue is a matter of changing the soil pH, but didn't you say they turn blue in an acidic soil? Yes indeed, and it still has to do with soil pH, but in a bit more complex way (naturally...) In higher acid soils, the hydrogen ions in the acid knock aluminum ions off of the soil particles in higher amounts. Aluminum is toxic to most plants, so when the plants start taking in all that aluminum, they try to keep it out of their systems by translocating it into- you guessed it. Their waste receiving vacuoles! The aluminun reacts with the pigments in the cavity and turns them blue. |
ggm citat: |
Zalomi grancicu ako je zelena ziva je a ako su sve suve mrtva je. Hortenzije tek krecu pa ako ima i malo zelenila ne brini olistace i v erovatno cvetati. |
zarkodj citat: |
Uradi odmah, eventualno malo ogrebi granu koja ide u zemlju. Duga je vegetacija. Do jeseni sigurno ožiljena. |
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