What am I doing wrong? Could it be a lack of sunlight in my house? Watered once daily, once per week I add growth medium to this mix. Seedlings placed near window but not the lightest not houses.
It sounds like they were getting too much water and not enough sun.
https://www.gardeningknowhow.com/ornamental/flowers/sunflower/growing-sunflowers-in-your-garden.htm
While searching for uses of Skyscraper sunflower leaves, I found many sites that had several healthy food consumption uses. There was only one site that had negative info, saying not to eat them because of bad digestive and skin problems. Could you help me clarify this discrepancy? Thanks in advance.
I spent quite a bit of time researching this and while there is plenty of information about growing sunflowers for the oil or the seeds, I only found a couple of reputable sites that mentioned the whole plant was edible. However, I didn't see anything about digestive or skin problems. But it could be that some varieties are more palatable than others. In any case, sunflowers are not toxic, so they should be safe to consume. Historically, sunflowers were used by Indians for food and dyes.
I've grown sunflowers myself, but not the 'Skyscraper' variety, and I wouldn't eat the leaves just because they get buggy quickly, especially by aphids. The leaves also are susceptible to powdery mildew and rust.
https://www.gardeningknowhow.com/ornamental/flowers/sunflower/are-sunflowers-edible.htm
You had it on your monthly e-mail about 2 months ago.
Hmm... I'm not certain which that would be. Perhaps it was one of the articles found, here:
https://www.gardeningknowhow.com/ornamental/flowers/sunflower
My dog has chewed through some of the leaves on my growing sunflower plant will it still continue to grow?
Yes, it should continue to grow. You may want to remove the the torn leaves to tidy it up and prevent disease entry.
Full grown giant sunflowers have suddenly developed powdery mildew. Can I harvest the dried seeds for next year planting?
They can, given that you use an appropriate fungicide, like neem oil, but you should treat the plant first.
https://www.gardeningknowhow.com/plant-problems/disease/get-the-cure-for-powdery-mildew.htm
When do I need to feed it fertilizer
This article should help:
https://www.gardeningknowhow.com/garden-how-to/propagation/seeds/seedlings-turning-yellow.htm
They had been doing well but now they are suffering, Any suggestions?
It's hard to tell in the photo but they look like mealybugs, which are a type of scale. Try spraying the leaves with Neem oil every 7 to 10 days till it is cleared. Here is more:
https://www.gardeningknowhow.com/plant-problems/pests/insects/outdoor-mealybug-control.htm