I've ordered a pack of those apo bulbs and only got five instead of those 7-10 that they advertise. I started a thread here and found out that the larger bulbs tended to do better and look less stringy so I didn't complain. All the bulbs I see in stores are dinky and shriveled looking and still had only 5 when it looked like they could fit 10 more at least of that same kind. I haven't planted mine yet but I will soon

You do not need to sterilize them and I'm pretty sure they are safe.