I am a 'first timer' and I have planted spinach, broccoli, carrots, and some other veggies. The 'others' are doing well, but my spinach leaves (now approx. 8 inches wide) seem to be yellowing on the tips of the leaves, and some appear to be dying. My broccoli leaves are getting white spots, and my carrot leaves are turning a light brown on the tips. What's going wrong?
It sounds like a watering issue. These are signs of either over or under watering. How often and how much are you watering? Rather than water once a day for 5 minutes, you are better off watering 2-3 times a week for 15-20 minutes. This gets the water deeper and helps the plants develop deeper roots. Watering for short periods of time keeps the water near the surface, where it evaporates faster and it may be the plants are not getting enough water because of this.
I am growing spinach and I have noticed these small, odd looking spores growing on the stem of the plant. What are they? Will the hurt my plant?
Sounds like it may possibly be rust. This article will help:
How do I plant spinach seeds?
General rule of thumb when planting seeds is to plant them about 3X deeper than they are big.
Beyond this with spinach seeds, they tend to be a bit tough, so rubbing them a bit with sand paper (just enough to scratch them) and then soaking them overnight in water will help speed up their germination.
Tigercat variety is for cool, coastal weather here in N. Calif. I want to grow it in hot mountainous climate. What precautions will help me succeed?
It will still be difficult, but them best thing you can do is to provide protection from the sun and keep the roots cool.
For protection from the sun, take a look at row covers or plant in dappled shade.
For the roots, heavy mulching and drip irrigation with cool water is the best route. Good luck!
Can you eat spinach with curl leaf virus? Will it hurt humans if eaten?
This virus only causes harm to plants and is not a threat to humans. So, you can simply wash off the spinach and eat as normal. For more information on curly top virus, this article will help: https://www.gardeningknowhow.com/edible/vegetables/tomato/treating-curly-top-virus.htm
Will hail cause holes in spinach leaves? Thanks.
It certainly has the potential to, along with any other plant in its path. This article can help: https://www.gardeningknowhow.com/plant-problems/environmental/hail-crop-damage.htm
The leaves of my spinach plants are drying up and dying. The plants are in pots. I looked closely and saw fine blackish dust things on the leaves. They are dried up leaves and on one leaf, I saw a small larva inside the leaf. Is this a disease? I don't know what it is. Should I keep them separate from other plants? They were transplants and ever since the hot weather set in, they got that way.
"The black dust you describe sounds like sooty mold, which is a fungus brought about by pests. Neem oil will help with both the fungal issue and insect pest which may be causing it. This organic insecticide/fungicide is safe to use on edibles too. Here is more information: https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm