Hawaiian Woodrose - Knowledgebase Question

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Question by AJEDavis
January 3, 1998
I have tried numerous times to grow a plant called a Hawaiian woodrose. It is supposed to grow a few inches a day. Do you know a good supplier, or have any instructions on growing?


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Answer from NGA
January 3, 1998
Hawaiian woodrose, or yellow morning glory (Merremia tuberosa), is available from J.L. Hudson, Seedsman (Star Rt.2, Box 337, La Honda, CA 94020; sorry - no phone!). This tender perennial is native to the tropics. Hudson's claim the roots are hardy toZone 6, so it may overwinter in your area and emerge from roots in spring. Some gardeners prefer to keep Woodroses in pots so they can be easily moved inside for the winter.

Since the seeds have a hard coat, soak them for 24 hours in warm water before planting. You can sow seeds outdoors after danger of frost has passed, or start them indoors 6-8 weeks before your last frost date. To ensure germination, the soil needs to be kept at 70F - they should germinate in 8-10 days. Once they're sturdy,harden them off, and plant them in a fertile, well-drained soil. They will tolerate less fertile and drier soil once established.

If you choose to bring your Woodrose in for the winter, trim them back to a manageable size and keep them in a warm,sunny place. Water them just enough to keep them from wilting. As the last frost date approaches, give them more water to get them growing vigorously again.

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