I found that out on seedlings of Hechtia and Dyckia platyphylla seeds. They all germinated and filled the whole saucer tray. Very tiny green seedling. It took 4 months for them to get 1/8 inch high with two tiny leaves. Then one over watering and they all died by the next day. Went from hundreds to zero in less than a day. I was disappointed with how very slow they grew. It would take years just to get a plant 1 inch high.
If you plan on growing from seeds, you must be willing to spend a great deal of time with them with hardly no growth improvement. Enough water only to keep the soil evenly moist, not wet. Best to let the roots dig for the water and have a dry top. Takes skill to do that. Good luck.
Stush