Indoor Grapefruit tree
I have a Grapefruit tree that a friend gave me. I live in Maine so it is an indoor plant. The tree is about 9 feet tall, but tends to loose its leaves around this time of year, especially on the lower branches. This season the leaves have continued to drop and as of yet no new leaves are taking their place. The leaves are normally green, but this time of year they tend to turn yellowish. I have been feeding it Miracle Grow about every 3 months and water it every 2 or 3 days. Is there something else I should do? Should I trim the branches that are spindly and no leaves are growing on? The top of the tree is lush and full with just a few yellowed leaves. The tree is in a south facing window and does get around 65 degrees in winter and up to 85 to 90 in spring and summer as it has full sun. Thank you.
Some leaf drop is normal. Excess leaf drop can be due to uneven watering, pests, and disease.
Citrus need full sunlight and warm temperatures, so an indoor setting is not ideal.
You can use a grow light to increase the light.