I always get my greens too thick when planting the seed. Is there a seed spreader that can be used to plant the green seed?
I have a great tip for you!
Visit a cooking store near you and look for empty spice shaker jars. You need a top with larger holes then a salt shaker.
Put your seeds in and shake out onto the soil surface!
Several years ago, I bought seeds for mache, a French green. I raised some in the fall and liked them a lot. For the past 4 years, I have planted mache seeds in both the spring and the fall and I have never had another mache seed come up. Why? I have been gardening for 40+ years.
I really don't know unless the seeds are not viable. While these can be finicky when it comes to germination, you should still have gotten something. And since you've been gardening this long, I would think the soil and growing conditions for this plant are being met. Very unusual. I wish I could be of more help, but all I can think of would be the seeds or the soil. You may want to try a soil test to see what this turns up.
Planted greens - they're ready harvest. Do I pull from stem or take whole root?
Harvesting of greens can vary between variety, but you can harvest most greens by taking individual leaves, cutting the plant at the soil or pulling the entire plant.
https://www.gardeningknowhow.com/edible/vegetables/greens/leafy-garden-greens.htm
I've Been getting these yellow leaves recently with my kale and spinach. I’ve been consistent with fish emulsion for nutrients once a week. What else can I do to stop nutrient deficiency? Do I need to add manure to top layer of my soil or worm teas?
Fish emulsion will be, mostly, nitrogen. This deficiency will appear on the newest leaves first.
Because of the high nitrogen content, a weekly feeding may bring the soil to be too acidic. This can lock out phosphorus and potassium, as well as calcium and magnesium.
That looks like the classic symptoms of a magnesium deficiency.
I would add a simple handful of DOLOMITIC LIME per container. This will help to correct the issue.
In the future, I would make sure to test soil EC (electrical conductivity) which will tell you the nutrient content, and the pH before adding nutrients to make sure that there isn't already enough or too much.
Alternatively, you can do a dropper test, which can tell you some of the same information. This article will help: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm
This article will help you to grow winter greens:
https://www.gardeningknowhow.com/edible/vegetables/greens/growing-greens-in-winter.htm