Popcorn cassia is easy to grow as an annual or perennial.
In tropical regions, it will form a multi-stem shrub.
It is a colorful and welcome addition to both tropical and temperate landscapes.
Its flowers attract butterflies, insects, and birds feeding on the nectar.
The plant is toxic to humans and pets.
Here is how to grow this striking tropical plant.
Plant it in full sun and well-draining soil with a neutral pH.
Whether you plant it in landscape beds or alongside other shrubs, give it room to expand.
In cool climates, enjoy popcorn cassia as an easy-to-grow annual in containers.
How and When to Plant Popcorn Cassia
Plant popcorn cassia after all danger of frost is past.
Place the plant in the hole and backfill with the original soil.
Tamp it down and water it immediately.
Keep watering the plant until it is established.
Space plants 2 feet apart.
If you live in zones 9-11 where popcorn cassia is grown as a perennial, staking is helpful.
Popcorn Cassia Care Tips
Light
Popcorn cassia needsfull sunto thrive.
In the absence of rain, water the plant regularly.
But when temperatures fall below 80F, the growth slows down significantly.
Popcorn cassia does tolerate a light frost.
In cold regions, overwinter it indoors in a greenhouse or a bright window.
Bring the plant inside when nighttime temperatures are in the high 30s.
Pruning
Pruning, if at all, is done after plant has finished blooming.
Potting and Repotting Popcorn Cassia
Popcorn cassia does well in a container.
Fill the container with well-draining potting mix.
Container-grown plants require more frequent watering, on hot summer days at least daily, and also more fertilization.
Pests and Problems
The plant does not have any significant pests or disease issues.
Poorly drained soil can lead to root rot.
Deer usually leave it alone, too.
It grows up to 8 feet tall.
It is a tall, purple-blooming prairie-throw in verbena that happily reseeds in the garden.
It has the potential to spread to wild areas, displacing native species.
No, it is not edible; in fact, the plant is toxic to humans and pets.
Updated by Nadia Hassani
Plant Profile: Popcorn Plant.Minnesota State Horticultural Society.
