I am new here. I built a passive solar greenhouse from a plan I found in The Passive Solar Energy Book. All walls are solid except the south face. I poured an 18" high perimeter foundation, put in chicken wire, then large gravel, and bricked the center area. Under the shelves I placed water filled black barrels. I don't know how well this works as I have nothing to compare it to and I assume it depends on your individual climate. However, here, in the foothills of central California we get sun in the winter (T-shirt and jeans OK outside) though it gets cold as soon as the sun goes down. The GH is not finished and has openings at both ends where I plan to put in an exhaust fan and some intake louvers. Even with these unfinished openings it gets very hot. . .this month it was up to 115 degrees. I don't have the electricity ran to it yet, so leave the door open and can keep it between 90-95. I hooked up a weather sensor in the GH and have that linked to my computer and see that it rarely gets below 45 degrees at night even when it is about 30 degrees outside. Again, I am new to this and still learning what I need to know and cannot say how effective the heat sinks are. I plan to put in an exhaust fan, two intake vents (trying to decide whether to have motorized or gravity louvers for the intakes). I will put in a HAF fan system. . looking at one of those rectangle thermostatically controlled window fans with two small fans both reversible and with speed controls and set one one direction and one the other direction to get circular horizontal air flow - these used be about $40 at Lowes. I also had a spare 6" fan in a section of heating duct pipe so I installed that to duct runs to opposite corners of one side of the GH - about 6" up from the floor and then ran it up to a "T" in the center of one shelf and then and blow air into the center of the GH . . even when it is hot in the GH it is considerably cooler under the shelves - really amazingly so. Still experimenting. Everything I have planted has really grown rapidly even with a lot of heat an no fans as of now. At times in the winter it can get down to 20-25 degrees. . . this may happen a few times a season. I will have an electrical thermo controled heater to turn on when it gets that cold. Hopefully I won't ever need to heat it very often. I think my problems will be to keep it cool enough and air circulation.

Hi Toni The potting mix for leaves needs to be very light with at least fifty percent perlite which creates air pockets for the roots to breathe. Then add potting mix. I get the one labelled for AVs from Ace Hardware and Garden Center. Some people add some vermiculite which retains moisture in the mix. They should be placed in very small cups such as very small solo cups with small holes cut in the bottom for drainage. I use an Xacto knife also bought at Ace. Sometimes I cut about a 3/4" around from the top of the cup if it seems too tall. It is better for no more than one or two per cup because when they grow, they need space. If you cannot do this all in one day, put the leaves in water with a pinch of sugar. You can find many photos on this forum for rooting leaves and samples of trays with clear plastic lids to put them in after putting them into each small cup. You can also find the trays with tall covers at Ace. Because you live in Calif you probably have an Ace near you. The leaves will take nine months to grow to the small plant stage so they won't take up much space for a long time. You will start to see many more white plants in stores. It can be hard to find pure white but I saw Optimara has a new one on their website also. Yes, some folks like older or vintage violets. Have fun. J

Katy, Logee's is certainly an adventure in itself. I've been going there for years. My first times were when Joy Martin was running it. Even squeezing through the aisles single file is worth it. So many exotic plants growing over, under and around! It's only about a 40 minute ride for me. I don't know of any other greenhouses that have that kind of variety. The botanical center at Roger Williams Park here in Providence is big and interesting. There's a $3 admission though. Lunch afterwards would not be a problem. Providence has tons of great restaurants. Maybe some others here would be interested in one of these or something else. Bill

Mona, go to the top of this page and click on the word "forums". A list of should pop up that says Garden Forums, Home Forums, Nature Forums. Click on Garden Forums, then go down the alphabetical list until you come to "Suggestions?".