There are no nutrients in peat or perlite. So anything planted in that sort of medium either needs regular fertilizing, or it's running on fumes.

I'd get a good, balanced liquid plant food, and start them out with seedling strength or half strength. Use this every time you water them.

If you don't get around to transplanting them once they go outside, make a special effort to water them with fertilizer mixture. Since they probably won't need regular watering in the spring rains, this is a special effort.

When I transplant cuttings into their own pots, I give them 1/2 strength fish emulsion every other week.

Where are you keeping them? Yellow leaves can be caused by lots of things, not just nutrient deficiency. These little babies are pushing leaves at a time when their relatives outdoors are still sleeping. There are fewer daylight hours and a much lower angle sun than in late spring when temps start to warm and things outside begin to grow. This may not have anything to do with it, it's just the first thing that popped into my head. Don't even get me started on the possibility of spider mites ... we won't go there. :)

Nine new babies on your first try with cuttings is great! Congratulations.

Connie

I use controlled release fertilizer like Dynamtie 18-6-8 from Lowes or HD. It is a 9 months release and I think it works great. That's what I am using right now on new cuttings. They are inside where the temperature is at constant 68*F under grow lights and humidity dome. So far 17 out of 18 'Nacogdoches' are alive with new growth. Probably a month old so far. Maybe 3 weeks? I also mist spray cutting daily, alternating filtered water and weak solution of seaweed/humic acid. They are grown in rootmaker propagation tray where they air prune roots leading to faster and superior root system leading to faster growth due to higher nutrition absorption from more roots from being air pruned.