it's the 4th of january and my living stones have been without watering for 18 days. 1 of the conophytum plants has gotten wrinkled but plumps back up the day after watering (the 5th of jan.). both of the argyroderma however have completed their leaf change. 1 of the lithops plants is in the middle of changing leaves. another one has grown the new leaves next to the old ones instead of splitting properly. all of the monilaria plants are splitting as well. so far none of my living stones died because of the extended drought. the artificial day lenght has been 8 h during the whole vacation.
Wikipedia on grow lights : "A plant's specific needs determine which lighting is most appropriate for optimum growth. If a plant does not get enough light, it will not grow, regardless of other conditions." "Grow lights usage is dependent on the plant's phase of growth. Generally speaking, during the seedling/clone phase, plants should receive 16+ hours on, 8- hours off. The vegetative phase typically requires 18 hours on, and 6 hours off. During the final, flower stage of growth, keeping grow lights on for 12 hours on and 12 hours off is recommended." "In addition, many plants also require both dark and light periods, an effect known as photoperiodism, to trigger flowering. Therefore, lights may be turned on or off at set times. The optimum photo/dark period ratio depends on the species and variety of plant, as some prefer long days and short nights and others prefer the opposite or intermediate "day lengths"." ...
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