That is not to say that moving them out is easy, exactly. Transporting 150 plants, however few at a time, is still quite a task. And it is not like I can just put them out all at once, even if I wanted to. That would take some time, but it would be a one-time task, and I'd be done with it. Why can't I put them all out at once, you ask? Because the one thing my property lacks is shade. Even sun-loving plants grown in south windows need to be introduced to full outdoor sun gradually. And the only suitable shade I have at my disposal is my very small front porch. The area under the maple tree isn't a good place for a lot of small pots. And the yard to north side of the house, which may be available in the future, has been a fenced-in dog run for several years, and will need a bit of attention before it is people-friendly.
Cacti are usually the first out. They have already started their "march" forward, as described below, with a few Echeveria bringing up the rear.
So what do I do? I start by putting a few plants toward the rear of the porch, which faces east, and gets a bit of morning sun. Every couple of days, I move the plants up a bit, where they will get more and more sun as they move forward. As space toward the rear opens up, I add a few more plants. Once the plants get to the very front of the porch, where there is some southern sun as well, they are fully acclimated and can be moved to tables in the full-sun backyard. So for a couple of weeks, I add and move plants every few days until they are all ready for the sun of summer.
Crassula and Aeonium species share the porch table with the Hedera helix varieties for the time being. By early June, the Hederas will have the porch mostly to themselves, with maybe another type of plant or two. Other than the succulents and the ivies, most of my houseplants stay indoors year round. That's why I call them houseplants.
I've always loved succulents, but I never attempted to grow more than a few until I had an outdoor space. Except for my Sanseviera trifasciatia and Haworthia varieties, which live indoors year-round, I guess I think of them more as plants that must spend the Illinois winters indoors, rather than as houseplants in the purest sense. While I appreciate them at all times, (hence the "In Praise of Succulents" series of posts) I truly revel in my succulents during the summer.