Do raspberries need a different approach

Really? Good to know, but we keep our house at 72° most of the day AND they’re in their...”greenhouse” setup. (Tupperware container)

Best fertilizer for seedlings?

Your standard hydroponic fertilizers all will work at quarter strength

I’ve been using Superthrive, diluted. Maybe I have to adjust the dosage.

Do you know how much you've been diluting? From what I've learned is when buying store bought nutrients always go with half the nutrients strength. ..than the lable says , they obviously just want you using as much as possible ... so I said 1/4 for starting but depending on size they could be ready for more nutrients ... bit as I'm typing this out I wonder , are you watering every day or so?

I asked cuz most common problems with new people I suffered with this a lot was over Watering your seeds they actually enjoy having a lot more air to make the root move and look for water the more water in the media the West work the route needs to do so less growth can happen

Second part is my speculation and observations over my year of learning btw I'm a total novice

I was diluting and feeding every other day but noticed water (and probably some of the nutrients too) collecting in a pool at the bottoms of the containers so I would dump that out because I know the rock wool is still wet.

well we got your problem right there Johnny

and now I think we solved it so what you'd like to do is let the cubes actually go from their dark green to a more lighter color and actually become dryer usually four days depending on the plant

Sounds like it. So how do I give nutrients without over-saturating the rock wool?

if you've watered with some nutrient water already then you're good to go The Rock was holding the nutrient water for you so they're going to eat drink it all up and once it starts to get lighter they need more food than water

Makes sense. It’s probably been a good 4 days since I last gave nutrients, so I’ll assess them when I get home. Thank you!

so 4 days since any water has been added?

I think I'm confused about your nutrients then? Are you nutrients mixed in with your water that you use to water them?

yes, again...perhaps my dosage has been off but I’ve been adding 5ml of nutrient solution to about 10oz of water. Then I would apply about 1ml(maybe less) of this dilution to each seedling.

sorry the watering every other day and the 4 days from giving them nutrients are what confused me

So I considered giving them nutrients to be also watering them. I wasn’t also giving them water on top of that.

I'm here for you but it's always hard over text anyway. But as soon as you get home you have any questions hit me up I'm happy to help I would say let's start with reducing the water so The Rock will has more time to dry.... there are also other Solutions I have for you I just don't like sharing them on this sites cuz I don't want every average person doing them

you can message me directly also I'm happy to help

And learn for myself

Thanks, Ross. I appreciate you hashing this out with me. I’ll probably be reaching out again.

my pleasure ha ha it sure beats me trying tondismantle old fluorescent 2x4 drop ion lights to light my rails

No clue what I'm doing ha ha but its progress

So took the 3 and made a ballast bank I think I only need 6 T8 bulbs so it leaves me with 3 spare for adding.

Wow. That’s a bit beyond my skill set. Lol.