I live in Texas. The ivy bed is in the shade, but our gardeners like to weed eat the ground cover. I have told them not to do this because of diseases. Please tell me when the proper time to prune is. It seems logical early spring and early fall, like trees.
This article answers your question: https://www.gardeningknowhow.com/ornamental/groundcover/english-ivy/english-ivy-plant-care.htm
I need to know how to grow ivy on chain link fence that sits on a retaining wall of rocks and very little dirt? Would like it to happen quickly.
No plants can grow without soil, so I'm thinking you need to plant in the soil at the base of the rock wall. Here are a couple of articles with the kind of information you're looking for: https://www.gardeningknowhow.com/ornamental/groundcover/english-ivy/english-ivy-plant-care.htm
https://www.gardeningknowhow.com/ornamental/vines/ovgen/growing-plant-cover-fence.htm
What is the best method or chemical to eliminate ground ivy?
This article has a number of approaches to killing ground ivy, also called creeping charlie: https://www.gardeningknowhow.com/plant-problems/weeds/kill-creeping-charlie.htm
How and what is the easiest way to root an arrowhead ivy?
I'm guessing that by arrowhead ivy you mean the syngonium. Take cuttings from the heavy vining stem, not leaf stems. Use cuttings that have at least one node (joint) from which the roots can grow. They are very easy to root, using almost any method - water, potting soil, perlite, etc. Try a variety, and use what works best for you. https://www.gardeningknowhow.com/garden-how-to/projects/rooting-plant-cuttings.htm
For indoor plants, when you say the leaves turn yellow "at the end" do you mean furthest from the dirt in the pot of closest? We have yellow leaves just around the roots of an ivy plant. Are we watering too much or not enough?
Usually, at the end means the tips of the leaves while yellowing nearest the roots, like yours would be the base of the plant. At any rate, yellowing leaves are due to stress, regardless of the area in which it's found. Pinpointing the cause of the stress will help with treating the yellowing. These articles will help with that: https://www.gardeningknowhow.com/plant-problems/environmental/plant-leaves-turn-yellow.htm
https://www.gardeningknowhow.com/houseplants/ivy/ivy-turning-yellow.htm
How to stop ivy growing when it gets to a certain point that is when it gets to a wall. And it's growing downward.
Pretty much all you can do is keep it pruned when it gets to that point. A yearly pruning should keep it in check.
I have put the end of the ivy in a coffee can and then put that in the ground to hide it. Keeps growing but it balls up. Then just cut it off 6 months later and repeat.
I have about 100m of ground that was under 3 very large trees to cultivate. Currently, there is considerable ivy growing in it which I'm attempting to dig out, having first sprayed the leaves with concentrated Roundup. I have 2 queries about the next steps.
1. Is there any point spraying Roundup directly onto exposed ivy roots (i.e. those I've dug up and exposed but there are too many to easily totally remove)?
2. If I break up ivy roots via a rotavator, will each section potentially regrow as a new plant?
Thanks
From experience, ground ivy or creeping charlie is extremely difficult to control and remove.
Here is a link that may help you with some tips.
https://www.gardeningknowhow.com/plant-problems/weeds/kill-creeping-charlie.htm