I purchased a pack of summer savory seeds in March of 2018 from dollarseed.com and planted them probably the same month. They turned out to be extremely easy to get started in my unheated greenhouse. I transplanted them out into the garden in the spring into partial shade, with black plastic covering the ground (I had basil, sweet marjoram and other things growing nearby). It hardly needed any water (I maybe watered it three times). I didn't harvest any of it until later on, but when I did I regretted not having done so sooner! It was awesome. Not only does it smell great, it can make edible gourds taste like lasagna! It smells kind of like lasagna as is. See my post in one of the gourd forums for what I did there.
Anyway, it's nice that you can use the stems, leaves and all. They practically dried before I even harvested them, too. The plant seems to grow fairly fast.
This is one of the best dollars I've ever spent. I might have extra seeds left for next year (I hope so, since I only grew one container of plants, which I overseeded).
Here are my plants, this year (one spot is a volunteer from last year's plant, and the others are from the original seed packet). These are being grown with south and eastern shade, and very little water. I've read that savory needs full sun and lots of water, but … I did start my plants early, in my unheated greenhouse, though.
There's one more plant than is pictured; however, it's very small, and there's a much larger volunteer tomato in the same spot.