Plant starting

It's all the stuff that goes in happy frog defiantly pal.. you wouldn't give guano to a seedling period and that's not the only stuff in that medium, it's packed with all sorts.. Good luck pal

Try putting seeds straight to soil, no presoak, no play. I have best sprout rate that way.

jiffy is too acidic. ff .. is ff. Keep it simple. Use small seedling pots. Fill without compacting too much - keep it fluffy. Water. Compress a hole 1/2" deep. Place seeds in sideways - that way you don't have to remember which way it opens or care too much about it, lol. Cover from sides and gently tamp down. Use a humidity dome up until they sprout. This will ensure you don't have to water until after they sprout. If in a cold environment, a heat mat will improve consistency of germination/sprout times. don't be cheap. Buy one with a soil thermostat probe or it is useless - set to 76-80F. Once they sprout, remove dome. Water as the top starts to dry, but don't let it dry "1-inch" deep like you would with a larger pot of soil and a more mature plant. If you get a little algea or growth on top of soil at this stage, it's sometimes inevitable. ph-balance the water to 6.0 for soilless and 6.5-6.8 for soil. not sure what charge comes in happy frog but as long as it isn't significantly higher than 1.0-1.5EC, probably not the cause. Could be old seeds? could be poorly ph'd water. could be a lot of things. Dial back to a simple method... eliminate possible causes for an easier conclusion. I use pro-mix hp or bx which comes with a ~1EC charge. Never had a problem. happy frog is a light mix, i believe? I'm not a fan of FF products, so i'm not super familiar with them, but I have germinated in FFOF + added perlite before and it was fine, so seeds are fairly resilient, but still good not to push it with hot soil.

If its after you place into ffhf that's your problem as it can be to hot for such a small plant, try an unfertilised soil around the plug so has to grow out threw this and so will be strong enough to take the nutes. I don't think the new apartment has anything to do with it..