pirl said:Welcome, Joanna!
The stems are thin but so many clem's have "almost dead" looking stems. It's really not a problem though not what we clematis lovers want to see on a new arrival.
Please don't fret over ugly leaves. It's the roots that are important. You can cut off any offending leaves and then put the clematis in a well prepared spot (head in sun, feet in shade). The soil should incorporate compost, manure, Epsom Salts (one tablespoon to a gallon of lukewarm water). Angle the plant towards the trellis (or whatever you choose to have it grow on). Insert a sturdy stake. Mulch the soil heavily.
The Epsom Salt drink will encourage new stems to grow.
pirl said:It's good that they sent a better clematis than the first attempt. Some are rootbound, depending on how long it spent in the small pot. You did the right thing in teasing the roots apart and planting it.
Please mulch both plants.
pirl said:Nothing rubber! Nothing dyed! Visit your local Agway, Lowe's or Home Depot and check out their offerings. I prefer the "crushed pine needles" but only one Agway carries it and none of the big stores, here, have it.
Pine Bark mulch is also fine but those bags are heavy! The long needled pine are in lightweight bags. Both types are 3 cu. ft. per bag.