The Q&A Archives: Thin Corn And When Do I Harvest Brown Onions

Question: You answered my last question quickly and it was quite helpful. So hopefully it'll be the same now. I am growing sweet corn from settings I got from a local nursery. The problem is that although it is growing tall and I am now seeing the husks form, it seems to me that the stalks are very thin and not a rich color green. My experienced sister-in-law thought they could use a boost.
Second question is about harvesting brown onions. I also purchased the settings from the nursery. They have been growing strong w/ a full set of the greens developing. But when do I know they are ready for harvest? Do they buldge up like carrots? Should I separate the clumps of green onions to get a bigger sized onion? Please help.

Answer: I tend to side with your experienced sister-in-law. Corn is a heavy feeder and will respond to a side-dressing of blood mel or a diluted fish-based fertilizer. The should be fed when the stalks are 6" tall, and again when they're about knee-high. If you missed a feeding, it might explain why the stalks are spindly. Feed now, and water deeply once a week throughout the season.

Bulbing onions will indicate they're ready for harvest when the tops yellow at the end of the growing season. I hope you separated the plants when you planted and didn't just plop the whole tray into one planting hole! Onions develop green leaves for each ring they develop in the bulb. The more leaves, the larger the bulb at the end of the season. (Or at least that's been my experience.)

Hope you have a great harvest this autumn!

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