How to take care of baby lemon trees we started from seeds. ?

https://www.gardeningknowhow.com/edible/fruits/lemons/propagating-lemon-seeds.htm I've had fair success with them from seed -- but they are TREES and really need to be outdoors ... in my climate they wouldn't last the winter and inside I just can't provide the right environment. Good Luck!

I've grown container citrus, including lemons, for 25 years. Most problems with growing citrus has to do with root rot. It's from being "over loved"/ watered too much. Their roots need to be drenched then let dry out completely for this plant's on-going health. I would take the plants out of their pots and examine their roots for white firm healthy new growth. If roots are black and spongy, cut off this part. Base the size of your new pot [breathable terra cotta is best] on the size of the root system. Replant your lemon tree in soil made specifically for citrus and use correct watering from this point forward. When the plant is healthy and putting out new growth, use a citrus fertilizer as recommended. This is such a good project to teach children. You can do this!

Even if you have lost one, what a great time to talk to him about the importance of always trying again. You must be an awesome grandmother!

This is something that your grandson will remember for the rest of his life!!! When I was young, my Grandmother had literally thousands of potted plants and my mom and I would go to her house to help her with tending to her plants. I think that is what has given me a love of gardening to this day, and the green thumb to go along with it. I tend to be very nostalgic every time I'm planting something. Anyway, back to your question. Lemon trees grown from seed need to be carefully nurtured. Use a fresh lemon seed. Don't let it dry out! Rinse it off and remove any flesh from the seed, and plant approximately 1/2 inch below the surface of the soil. plant several to increase the chances of germination. Cover them with some plastic wrap and after they pop up, remove the wrap and give them a little more sunlight, but careful not to give too much. Maybe a windowsill. When they have several sets of leaves, then you can attempt to transplant them into a larger container with a sterile potting medium. You can use a water soluble fertilizer high in potassium every two to four weeks and just keep the soil moist, not soaked! They should start getting around 4-6 hours of direct sunlight with temperatures no lower than 60 degrees. As the tree gets larger, you will want to prune it in very early spring before new growth and repot to encourage some new growth. It may take 3-5 years to see fruit from a lemon tree grown from seed, but it's the journey that's the reward!!! The time spent together doing this will forever be burned into his heart! I Love it and enjoy doing this. I hope my tips will be helpful. God Bless!!!

Susan, is it still hanging in there? and have you ever repotted it? You could try repotting it in a one size larger pot with new soil. I hate to give up on the little seedlings. Doing things with your grandchildren is wonderful, isn't it? You may want to get a little tree, or rose bush that you can plant together. Every time he looks at the tree he'll always think of you.