The Q&A Archives: Soil Amendments for Cannas

Question: Last year I read about something that you add to the soil that makes cannas grow better and larger. I think it might have been Potassium, but Ii'm not sure. Can you please clarify this for me? Thank you. Jonathan Bellmore, NY

Answer: Cannas roots probably would like a bit extra phosphorous to grow well, so by adding a handful of bone meal or super phosphate fertilizer to the container, they should produce better. Of course, you always want to have a complete fertilizer such as 10-10-10 to start with, but adding a little extra P will also help. They also love lots of compost and organic matter to keep the soil moist and fertile.

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