What to do with your cuttings when they arrive
Fresh cut cactus need to age for 6-10 weeks after cutting. When I make fresh cuts for customers I have to wait 3-5 days for the cut to dry and harden before shipping to prevent rot.
When your fresh cut cactus arrives, stand them upright in an empty pot in a cool place out of direct sunlight. Check the cactus cuts every week or so for rot. If it is soft and slimy the affected area will need to be cut off. If they are a little soft and dry, they are fine.
After 6 weeks or so your cactus can be planted in a dry mix (Pro-Mix). Add just enough water to hold the dust down. Plant your 12 inch cutting in a 6-10 inch pot, 2-3 inches deep. Press the soil down very firmly to hold the cactus upright. Now you can gradually move your plant into harder and more direct sunlight.Do this gradually over a couple of weeks until your plant is in full sun.
You can start watering your plant about 1 week after planting. Let it dry out completely between waterings.
Often the San Pedro cuttings will already be aged and they can be planted immediately.