I can't recall seeing any pods developing and growing on my very tall Cassia bush either.
Pruning is the key to abundant bright blooms. The Cassia wood is weak and therefore breaks very easily, so handle with care during the growing season. When the bush is in a dormant stage, I prune back the branches rather severely. The Cassia is a fast grower and comes back vigorously in the spring.
My Cassia requires little care, seems to be pest resistant, and thrives in poor but acidic soil. I mulch around the Cassia but let it grow as it pleases. An interesting observation about the Cassia is that when evening comes, it folds its leaves. The blooms remain the same. I will now fold by blog for today.
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