One month after planting unrooted Spider plant offsets
The planters obviously are working very well. The plant in clay pebbles is a little more robust but the soil media plant is healthy too.
You can see the soil plant root system above. It took just a month to develop. The roots will soon penetrate through the Pellon fabric wick/soil retainer at the bottom and grow out into the reservoir.
I have added only about 3 measured ounces of water (nutrient solution) per week. Now that they have root systems it will be interesting to see how much more water they consume each week.
These are obviously very small planters and it will be interesting to see how big the plants get. There is no doubt in my mind that what you will see in a month will debunk what is said in most houseplant and gardening books. That's a long story for another time.
I have not had time to make any more glass bottle SIPs but look forward to doing so.