Benny--
Yes! The Swedish Ivy (it is neither Swedish--nor an ivy) has fallen out of popularity. Don't know why???
I had a customer (I work at HD in garden) come to me and ask if I had ever seen it in the last years--
and I said "Sure!" I grow a couple full HB's of it every summer--taking them in for the winter.
I promised her some rooted cutting--and she was the happiest person on earth.
I have always grown Swedish Ivy--in HB's. For years and years. I love the shiny leaves and how fast it grows.
If it gets a bit leggy--I just snip off the ends and start a new plant in a 6" pot-making the old basket more full.
---SOOO--If you were starting a new 6" pot of Sw. ivy--you will make 3 finger-holes in the soil and in EACH
finger-hole, you will put in 3 cuttings, So--9 total. Just shove them all in in a bunch.
---In an 8" pot--you would make 5 holes with 3 cuttings in each.
---10" pot--make about 8-10 holes-(3 cuttings each)--water it in and put it someplace to start growing.
Outside in summer would be ideal....in bright shade. No full sun is needed.
They will root quite fast--just be patient--as they will look wilted for a while...busy growing roots...
With this # of cuttings--once they root in--you will have a nice, full growing HB in a couple of months.
Be patient! it takes a while for it to get really full. It has to make new tip growth--which will also make new tip growth, etc. Pinch out just the small growing tips to make it fuller.
Come summertime--I hang them from my high patio roof edge, kind of shaded by a nearby tree--
and they live there all summer. Our high humidity here in the summer helps this.
I water them when I turn the hose on my other plants outside. Never fertilize them
--nothing.
I never do anything special--this plant is easy-peazy to grow. Believe me!!!
Now--there is a variegated one that looks like a Sw.Ivy--but it is not. It is called something else...???
From your description, Benny--seems you are fussing too much over these plants.
If you are just doing one cutting to a pot--it will not look like anything. Do the bunches as i wrote above.
Sometimes--ignorance is bliss when it comes to plants.
Now--NOW--SOME OVERALL OBSERVATIONS FROM YOUR INITIAL POST:
--You cannot compare the climate in AZ and how you watered it and took care of it with that in CO.
The climates are sooo different. You now live in CO! Not in the arid AZ!
--You are definitely watering it too much!! Every 4 days???? !!! Plus adding a fertilizer!!!! YIKES!!!
--planting the Sw Ivy in a " VERY LARGE CLAY POT" is, probably, your biggest mistake.
-- Big pots=too much soil in them Too much soil=too much water in the soil--which a plant cannot possibly absorb. The roots and plant may be sitting in very wet soil at all times. NO O2 for the roots!
=too much moisture =roots rotting =plant leaves turning black, etc...etc... I bet the roots arethe same.
You should re-pot this plant on an appropriate size pot (how big a pot was it in?). Maybe 8" or 10" pot--
depending on the size of the plant. AND--use very well draining soil Mix--like Pro Mix.
That is the kind of 'soil" most houseplants come potted in in any Nursery. Take a look.
Benny--I hope others will chime in here with their advice. Hang arounf here--you WILL get an education.
Gita
Here are a couple of my big HB of Swedish Ivies---2011 and 2013 This is what mine usually look like...