Let us know if any change. if you think it could be a deficiency the best way is a soil sample to your local extension, and tell them you want to grow raspberries. they will tell you what you need. If you want to just cover all bases. use Holly Tone or any complete balanced organic fertilizer. Dr Earth is also excellent. Many exist. You could add azomite, rock phosphate, also use kelp. This will supply all trace minerals and such. Iron is good too, like Iron-Tone. In the photo I see a small leaf with tip burn. That is usually too much nitrogen. Possible you have a leaf spot of some kind. If not many leaves are like this remove them. You can use copper, sulfur, lime sulfur as a preventative. All organic fungicides. I don't have any fungal problems here, but do use a preventative, as I need it for fruit trees, I hit the brambles while I'm spraying the trees.Usually early in the season before any flowers or berries. I use nothing once flowers form.

I'm sorry, new here, but I can't find out how to get to the answer! I have spots and dying leaves, and I'm watching helplessly as the stuff spreads across my yard. Help! Thank you...

You can buy iron in a bag at a plant store or as a liquid, but if the soil is not acid enough iron won't help. If you ph is above 7 you need to take the ph down to 6.5 or lower. If you drink coffee just add unused coffee to mixed with water or add some white vinegar to the water you use to water. Peat can create a more acid soil, if you mix an acid loving plant mix or peat into the soil. Once the ph is at a good level, then the plants can actually uptake the iron. I forgot to mention sometimes yellow leaves are the sign of over watering in which you may not be over watering, but have poor drainage. They don't sell Killex. I only use round up which has to hit the plant to create a kill, but I don't know about Killex. It is possible that it leaked from the soil into the rose? There are too many possibilities. I might dig it up and put it in a pot, if I really cared about it and I could not get a replacement. That would solve the ph problem or the weed killer problem. Use a rose potting mix and it should be already and later you can replant it.

You could try and prune it to a smaller size maybe if you wish to keep it in a smaller pot, my key lime is quite small and it went through several flowering cycles this year. Citrus are heavy feeders so providing enough nutrients is key. I use granular citrus fertilizer on a monthly basis just topdress the soil, and when my plants are fruiting and flowering I use a water soluble fertilizer weekly. They also make water soluble citrus nutrients which can be diluted and sprayed on the leaves. I prefer to apply smaller amounts of nutrients more often. Also I recommend using organic fertilizer, non organic fertilizer will lead to salt build up in the pot. The picture is the kinds of fertilizer I use. In the background you can see some key limes in my fruit basket.