Now that you have picked them up, it is important to plant your new
seedlings immediately.
Plant at the same depth as they have been growing, not deeper.
A light layer of mulch is recommended if these are going into a bed, to
help keep the soil more evenly moist and to minimize the chance of frost
heaving.
Water well at planting time and be sure to check them every day or two
for the next couple of weeks. If watered well, they will likely need water once or twice each week,
adjusting for rainfalls. Once the temperatures are dropping to the single
digits over night and only rising into the teens during the day, regular
watering likely won’t be needed. Do still check them a couple of times each
week though.
Once established in their permanent home, they will be fine without much
additional care. I recommend chop and drop mulching (cutting up stems and
leaves that are still standing in the spring and leaving the resulting mulch
right in the garden) and watering during very dry spells. Otherwise, these are
all plants that do pretty well without a lot of human assistance once they are
established.