Generally, yellowing foliage on Perovskia indicates TOO much water. This is
a very droughty plant and requires little if any irrigation after
establishment. I am surprised that planting on a slope is creating this
effect - typically sloped plantings have very good drainage. Are you
watering it often? If so, I'd cut back a bit and let things dry out.

pam - gardengal

"Angela Marsh" wrote in message
. 97.142...
I live in the Denver area and just planted a Russian Sage that's
about 18" tall, bought from Home Depot.

I planted it in full sun ( about 5 hours a day of it? ) on a slope
with good drainage and just checked the soil with a water meter and
it's moist but not too wet.

The problem is, in the 5 days since planting, the leaves are
starting to yellow from the base upwards. What did I do wrong, or
what do I need to do to help this plant make it?