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Can I Put Coleus In An Inside Window Box?

I am interested in buying Coleus for indoor window boxes.  I live in Manhattan, NY, and the window boxes are directly inside north-facing windows. The apartment gets full filtered sun all day, since there is also a skylight in the room.  I am hoping to find a coleus plant that will grow well in these conditions.  If possible, a trailing variety.  Humidity is very low, since I keep air conditioning on all the time in the summer. Can you offer some guidance?  Thank you! Sandie

Answer: Sandie,

Coleus could be a challenge for the conditions you describe since they tend to like warm tropical climates and you want to keep them in an air-conditioned space. Coleus were originally found in shaded areas but in the past few years new varieties have been hybridized that are fully sun tolerant. Your conditions would be considered full shade, so you would want to choose varieties that best tolerate shade; no coleus will do well without some sun exposure. As for temperatures, they will offer their best color performance in the 80- to 90-degree range but will grow well as long as the temperatures aren't sustained in the low to mid-60s and without draft from a vent.

So, that said, I am always one to experiment and push a plant’s comfort zone a bit, knowing full well that the experiment might succeed but if it doesn't, well that opens the window to try again!

Growing Coleus InsideSome of the ones you might try are:

Dark Star

Gold Lace

Mariposa

But experiment with any that we have in stock. None of the Coleus are cascading plants. They are all upright, so you might want to add one of our Hedera Ivy plants for the spiller plant. Play with the wild color combinations and leaf textures available with Coleus to create a stunning arrangement.

Coleus do not like a wet soil, so keep the soil evenly moist. They do best if you keep the blooms trimmed back and are easily trimmed and shaped to keep the plant shorter and fuller. A monthly dose of a water soluble fertilizer will also help keep them growing to their fullest.

Happy Gardening,

Karen

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