What to do after 1st frost
Thin hosta leaves "melt" with the first frost. Thicker leaves will last longer. Some hosta leaves become a lovely yellow in fall. Eventually, hosta leaves become unsightly and should be cut off at ground level. They are a good addition to the compost pile. Chopping the leaves a bit will speed decomposition. It is up to you when to cut off the leaves in fall. If it is a new planting, mark the plants location. They are not among the first plants that emerge in spring. If your winters are harsh, zone 4 or colder, mulch over the plant with pine boughs, straw, chopped leaves or wood mulch - up to 3-4 inches. Remember to pull mulch back in spring to expose the crown.
Can hosta's be cut back in the fall?
Yes, when the foliage has yellowed, you may cut it down to the ground. If it is a type that has thin leaves, it may compost in place. Hostas with thicker leaves like the blue-tinged varieties are best placed in the compost pile after chopping them up a bit. If you have a new garden, you may want to mark where the hosta are located so you don't accidentally dig into one. Hosta never need dividing but spring, just as they start to emerge, is a good time to divide them if you want to increase the number of plants.
I have the seeds for Empress Wu Hosta seeds and want to grow them in my SHADED side yard. Do I need to do anything special, lighting, soil, cover, not cover etc?
Hosta seedlings need lots of light to get off to a good start. I suggest grow lights if you are starting indoors. You also must have sterile potting mix as damping off is a big problem with hosta seedlings. The following article is from the Cooperative Extension in Minnesota. https://ask.extension.org/questions/383783
Check the website for Tennessee's advice. (https://extension.tennessee.edu/Pages/home-garden.aspx)
do they grow better in direct sunlight?
Most hosta not only prefer part shade, they don't do well in full sun. There are some new cultivars rated for sun but most hosta develop leaf burn in too much sunshine. If your winters are severe, plant in spring to give the hosta all year to prepare sturdy roots for winter. If winters are mild and summers hot, fall planting is also possible, perhaps desirable. All new plants need supplemental water weekly for the first year if rainfall is less than 1 inch. If your soil is sandy or temps are over 90, closer to 2 inches of water may be necessary.
I bring hostas & snow on the mountain back from my home in Michigan every summer and work hard to protect them, but the snails just get around my egg shells, across my copper scrubbers. Chemical weed killers give relief until watered. Is there a way to stop them??? Thank you! Patricia
There is nothing worse then finding your plants eaten by Slugs and Snails.
Some years can be worse than others.
I am listing several articles for more possible ways to help you.
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/epsom-salt-for-pest-control.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/organic-snail-control.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/kill-garden-slugs.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/kill-garden-slugs.htm
how to divide hostas
This article will help you.
https://www.gardeningknowhow.com/ornamental/foliage/hosta/dividing-hosta-plants.htm
Most of my hostas are coming up in a circle with empty centers or in a "C" shape...
This is a sign that they should be divided.
https://www.gardeningknowhow.com/ornamental/foliage/hosta/dividing-hosta-plants.htm