Unfortunately there isn't a blue Brugmansia, but this is the next best thing!  Iochroma australe is a rare Brugmansia relative with miniature blue Angel's Trumpet flowers.  This large bush from Argentina becomes smothered with 2 inch blossoms from spring through summer, creating a huge ball of blue!  In full bloom, it is truly spectacular!  It is rarely seen for sale.

Iochroma australe grows about 8 to 10 feet tall here in San Francisco.  It tends to go deciduous in winter, but if grown indoors, it will stay evergreen and can flower throughout the year!  It grows best in moderate temperatures, however there are reports of it growing in warmer climates like Florida, where it flowers during the cooler months.  Still, consider it experimental in very hot or dry climates.  It should be protected from frost, although it can probably survive a few degrees of frost.

It litters the ground with a gorgeous carpet of blue flower petals!

It enjoys mostly-sunny conditions.  In warmer conditions, it's best to give it some afternoon shade.  It prefers moist, well-draining soil and regular feeding, much like its cousin, the Brugmansia.  In the right conditions, it is an easy plant.   Note that the leaves, flowers, and fruit reportedly contain a toxin, so keep children and pets from eating them.

Unfortunately, fake seeds of it are being distributed from China.  I guarantee that my plants & seeds are genuine!

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Germination tips for this plant