Answer: When your vinca transplants get the correct amount of light they'll respond by getting more stout. Carefully transplant them, provide 12-16 hours of light daily, and keep daytime temperatures at about 65F (nighttime about 10 degrees cooler). By manipulating both light and temperature your vinca should stop growing so long and wispy. You can pinch your plants back to encourage bushiness after they've developed four sets of true leaves. Good luck with your vinca!
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