Answer: Heliotrope arborescens "Iowa" is often marketed and sold as an annual for growing outdoors in cold winter climates. It is however a perennial plant and can become almost shrubby with age. It is considered hardy in zones 9 and warmer, so as a houseplant you may be able to keep it going for quite some time. The slow release fertilizer is fine as long as you follow the label directions for the correct amount to use. During the winter, give them as much light as possible as they need sun to stay healthy. If they become leggy, shear them back in early spring to stimulate fresh new growth. Enjoy your heliotropes!
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