Never had a Fiddle leaf fig, but when my other plants drop leaves like that, it's usually because of lack of humidity. Obviously since I've never had one, I can't say for sure, so someone will add in with more information and experience. Beautiful plant! Also, for easier solving; How much are you watering? How big of a pot is it in? Is he root bound? How much light is he getting, etc. Good luck!

That you could go 3 weeks between waterings is indicative of a soil that's very water-retentive, so being aware of that from this point forward is to your advantage. You might invest in a 5/16" piece of wooden dowel rod that can be sharpened in a pencil sharpener. Cut it in half and sharpen both ends on each piece and you'll have 4 'tells' that will help you determine when the soil is starting to dry down deep in the pot. When the rod comes out clean/dry, it's time to water.

The next time you water, flush the soil very thoroughly by pouring water equal to at least 10X the volume of the pot through the soil. This will be like hitting the fertilizer (salty) 'reset' button. Follow the watering plan, and wait for new growth to occur. When you note new growth, you can fertilize. Foliage-Pro 9-3-6 is an excellent fertilizer for a number of reasons. You can trust me, or if you're interested, I'll list the reasons. It's an excellent all purpose fertilizer. I use it on everything I grow in containers, and that's a LOT of different genera/species.

I think if you get the watering under control, the plant acclimated to its new digs, and a nutritional supplementation program you can keep control of, you'll see a favorable response from your plant that will please you. If you're really brave and have a place to move the plant outdoors next summer, you can completely defoliate it, which will induce a new flush of pristine foliage. You won't be able to do that though, if you decide it needs repotting and root work next summer, a topic to be discussed after you get your new charge back on track.

Al

While the plant is sorting things out & getting it's feet back under it, it needs all the food its leaves can manufacture, so it's not in the plant's best interest to defoliate now. In fact, it's never in the plant's best interest to defoliate, which is why we need to be careful about the timing and make sure the plant is healthy & growing robustly when we do defoliate.

There are some things you can do to reduce the amount of excess water your planting can hold. Try to put some of the methods to use after each watering so you can get your plant through, in good health, until you can repot in the early summer (June). Click this link to read more.

Getting your plants into a soil that you can water copiously w/o worry about wrecking root health/ function will make a big difference in how much return you get for your efforts. Virtually every grower that uses soils based on fine ingredients bumps hard up against the limits those soils impose; unfortunately, most of them never learn what it's like to grow plants with root systems that can actually breath as they need to in order to realize their potential.

Questions?

Al

We all hope it does well for you. Come summer, I'm confident you'll really be able to get a good start on getting the tree turned around. In the meanwhile, if you feel like you'd like to read some things I think will really help you turn your thumb a little greener .........

Al

Sorry to take so long getting back to you, Melissa. I'm convinced the largest step forward you can take at any one time as a container gardener is probably the gaining of an understanding of how water behaves in soils and how that impacts your ability to consistently bring along healthy plant material; so what I'll do first is point to A Basic Overview (click link) that will help you avoid all the issues that more commonly befall hobby growers. If you find value in that thread, the one that discusses How Water Behaves in Soils (click link) should prove to be much more enlightening.

Let me know if you have other questions/issues you think I might be able to help with.

Al