Growing Living Stones at 63rd Parallel North

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"." ...

i ordered the seeds and the potting medium from a dutch seller called sunny plants. (all links on this post are non-affiliated) argyroderma delaetii 20 seeds conophytum calculus 10 seeds lithops mix 20 seeds monilaria moniliforme 20 seeds pumice 1 liter x 2 the shipping cost approx. the same as all the products together. = altogether the order was 50 euros things i already had at home: i potted the seeds in pure pumice in empty plastic containers with see-through lids. the containers were leftovers from different food packages. i used medical, sterile, non-woven swabs to cover the drainage holes in the bottom of the containers. i used the swabs already in my medicine cabinet. i used two plates i already owned under the containers. i used cocktail sticks from my pantry to help me sow the seeds. i used extension cord we already had for the plant lights. i had at home a bottle of cactus fertilizer so i didn't need to buy one. i bought: two small reading lamps...