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Madagascar periwinkle
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Posted by tropicsnut (My Page) on Sun, Nov 22, 09 at 6:47
| Has anyone encountered a problem with these plants where the flower becomes smaller and mini size? Looks like this.
Pic
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Follow-Up Postings:
RE: Madagascar periwinkle
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| Since you have the big one for comparison, I guess they're not all suffering the same problem, which lets out my main suspect: cold damage. Sometimes lack of nutrients, especially potash, will do that. Viruses can also do that, though I don't remember which ones. What does the rest of the plant look like? |
RE: Madagascar periwinkle
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| I did not take that picture but all my periwinkles look like the small one and i live in the tropics(although it has been cooler due to the nonstop rain). Could it simply be that the plants are old? |
RE: Madagascar periwinkle
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| I wouldn't call them old unless they were more than 4 years old. They may need a heavy pruning and some fertilizer to rejuvenate them. I would know more if I could see what the plants look like, or get a detailed description of the color and size of the leaves and stems. Foolishly envying your rain!
Kevin : ) |
RE: Madagascar periwinkle
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| Sorry I took so long. Lost track of things. I cut the plant down hoping it will correct the problem but same thing. 
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RE: Madagascar periwinkle
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| Whoa! That's a really shady spot, from the looks of it. Madagascar periwinkle needs a minimum of 6 hours of direct sun a day for normal flower development. The lower leaves are also indicating some kind of nutrient deficiency, possibly a combination of nitrogen, manganese, and zinc. Sorry, tropicsnut, Madagascar periwinkles need more sun than Caladiums can stand. Looking again, magnesium deficiency is also a possibility. Kevin : ) |
RE: Madagascar periwinkle
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| I don't think it's the sun because i have other periwinkles out in the open with the same problems. I'll treat for magnesium deficiency. Hopefully it gets better. :) |
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