Do you dissolve the eggshells in vinegar, and then add the vinegar to your plant water? I'll look him up, thanks.
egg shells are made of calcium, when you burn them (on brbq grill or just on a frying pan) - they are enriched with phosphorus. then you crash them as small as possible (with a handle of the knife or something) and put in vinegar - the egg shells will start to "dance" - the created gas will lift the shells in vinegar(once you do it - u'll know what i mean) - after about coupla days - the dancing will stop - and you dilute it in water and water the plant just before the flowering - it's the "morning sickness" remedy for plants. look up Carandang or read LumperDawgz's posts - it's WORTH it and they explain it much better than i ever can