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Watermelon /cantaloupe leaves yellowing

Posted by heavyoilguy Z2 ALBERTA (My Page) on
Wed, May 18, 11 at 10:54

I have tried for 3 years now to grow watermelons and cantaloupe in my greenhouse,Started from seed in the house, transfered to greenhouse in the original containers , plants look nice and green , flowers starting ,I have had them growing for approx a month in the greenhouse in their containers, now that I have transplanted in to the beds in greenhouse they start to yellow and slowly die off, all of my other veg grows really well , It's just these two and occasionally cuc's will do this also, I do fertilize with
10-30-10, Any help would be appreciated, getting frustrated, Thanks, James


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RE: Watermelon /cantaloupe leaves yellowing

  • Posted by fruitnut Z7_4500ft elev SW TX (My Page) on
    Wed, May 18, 11 at 12:16

I'd try a higher nitrogen fertilizer like urea, 46-0-0, or ammonium sulfate, 21-0-0. Melons are heavy users of nitrogen.

I won't use the very high P, 10-30-10, very often for anything. You don't want P to get too high and throw things out of balance.

The yellowing could be from other causes like cold soil, below 68F/20C, or too wet.


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Cure for cold soil

  • Posted by fruitnut Z7_4500ft elev SW TX (My Page) on
    Wed, May 18, 11 at 12:23

Since you are in zone 2 your problem with melons may well be cold soil. You can help that some by putting black plastic down around the melons and cover that with clear plastic. Once the melons cover that it won't help much. You may need to raise the temperature in the greenhouse. Your nights even in summer may be way to cold for melons.

How warm is your soil?


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