I have 3 eucalyptus trees that I had out all summer. I have them in the basement with a grow light and the leaves are all dry. The bark still seems alive and green. I was wondering if it is dormant? Died? How can I ensure that they have not died and can still be saved?
When you bring these inside, they will need much less watering. It is necessary to let them dry out a little between waterings. It is a common symptom of infection with necrosis that fast. I would add a little wettable sulfur and dolomitic lime to the next watering. You may even want a fan on them to get air circulated. The wattage of your lamps may be too high, or even could be that the lamps are too close to the trees. I would monitor the temperature to make sure it doesn't get too hot, or too cold. Here is an article that will help: https://www.gardeningknowhow.com/ornamental/trees/eucalyptus/eucalyptus-houseplants.htm