Sorry the correct spelling is "perennials".

I think it maybe 13-13-13or some thing lower.Roots seem to grow more in the fall and over winter.good luck Jim

Lord don't use 13-13-13! (Sorry Jim didn't mean to yell ;-) Nitrogen promotes foliage growth. Fresh green growth will die quick with the first frost. You want all growth hardened off for winter not fresh growth. I have never heard of a "Fall" fertilizer either but if you want root growth go for bone meal. Or even better apply a mulch that will protect the plants over winter and by next spring the mulch will have pretty well rotted (don't use bark or pine needles in this case) and will have been releasing natural fertilizers into the soil all winter.
Mike

If you have good well amended soil that you add lots of organic matter to, then "fertilizing" becomes a moot point. The plant will have lots of available nutrients and take just what it needs whatever time of year it is.

What about the evergreens(cast iron, monkey grass, boxwoods, etc.)? Do they grow in the winter? Do they need fertilizing? I know that my winter veggies do BETTER when fertilized.
Thanks,
Lynn

With the veggies you want to promote growth. I still use compost whenever I can. Too much Nitrogen will make the veggies frost tender.
With boxwood and the others you listed you want it to go dormant. Any fresh tender growth will simply freeze and die. You want growth in the spring not over winter. Oh and I believe the "Fall" fertiler must be something like bonemeal which is a source phosphorus which promotes root growth.
Mike

It's ok,I did not think about the nitrogen.I use gin trash in the fall no bad problem with weeds as it sets over winter.sorry good luck Jim