Sounds like lack of water not fertilizer. Generally, new plantings should be watered, one gallon or more depending on the size, every two days for the first week and increase the daily interval by one day till you reach once a wk. Continue weekly watering through the second year.

I grew Heritage raspberries here on the East side in Albuquerque some years ago & they did well... birds luved them! I did finally make a 6 ft.cage of netting to keep the birds away & could pick a pint or so every day. The bush roots did spread & eventually took up too much of my garden space so I let them die but yes, they did very well here where I live & the soil here is caliche ... good for pottery making(!) but ammended with some of our son's West side sand!

Good luck & I hope your's survive with more watering.

You need to add acid to the soil and keep them moist. We have alkaline soils which these plants cannot tolerate unamended.

Peat is a great source. Work tons in.

Iron chelate may also help with yellowing.

My take on berry bushes in Albuquerque. I know of some commercial Raspberries grown in the area, but I think these are in Zone A2-in mountain humus soils. In ABQ proper alkaline will keep you from either having fruit set, or it will stunt and die over time. Use a treated water to lower Ph to 4.0 Our H2O is even too alkaline.
Interesting that someone on the Front Range has been growing berries (Blueberries no less)in peet bales, and sinking the bales into the earth-with only puncture on top planting hole. It is how I now grow mine. Don't fail to wrap your twigs over winter with a warm cheese cloth-or suffer wind kill.

Rightwingback,

Is that a redbud tree behind you--or what? I'm new to this area.

Yes thank you Perlana, it is an Oklahoma Redbud. Welcome to the Southwest! Not sure what you were accustomed to, but I came here from south Texas. The soil was something i had to learn to deal with.