@Carol Dee I know it's not the approved way of propagating clematis but I've always had good luck rooting them in water, cut in between the leaf nodes leaving a piece of stem, when roots appear pot up and keep potting up until you reach the gallon size. Then I grow on in the gallon sized pot for a year before planting out.
How I found out this worked for me was I sniped a flowering stem to show someone, then stuck it in a coke can of water in the greenhouse, forgot it was there, I was cleaning up one day and went to throw it out and found it had formed a massive root ball. I've been rooting them that way ever since, usually sit on the kitchen window sill through out the winter.
@Larisa my clematis don't get much in the way of fertilizer, sometimes a bit of a slow release of whatever I have at the time. I plant the root balls deep, and make sure they roots stay moist. When planting my first clematis I used to worry about keeping the roots shaded but don't anymore, I think keeping them from drying out is more important.
Here's a few more of mine....
Haku Ookan, blooms twice, semi double on old wood single on new.
Omoshiro
Vyvyan Pernell
H.F. Young
The Vagabond
Bluebird
I have more but some I don't have a picture of, I planted Sweet Autumn Love last fall, hoping to see a few scented flowers this year.
Annette