I would like to add that 2 days prior to the leaves turning yellow, i sprayed them with neem oil solution mixed with water. I highly suspect that that was the root cause of this happening as it seems like only the area which was sprayed on are affected. ** Updated Edited**, the other Ficus that had been at my place for awhile was sprayed with Neem oil as well but those plants doesn't seem to be affected. I can safely assume that the Neem Oil wasn't the culprit? Just to add on some information that might be helpful: Tree was grown outdoor at the nursery and is about 9-10 feet tall, did a repotting, made sure all the old soil was replaced, no root pruning was done. I did however made a mistake of not fully rinsing the perlite thoroughly before using it. The weather here is very humid (example: a pair of soaking wet jeans would dry up in 2-3 hours of afternoon sun.) Can't seem to find any pest that could be responsible.

It looks like all the overwatered FLFs I've read about on the houseplants forum, and all of them have turned out to be caused by overwatering. 'Overwatering' happens when the soil stays saturated for long periods of time, preventing air from prejudicing oxygen to the roots, leading to dead and rotting roots and a plant that starts to kill and drop leaves its reduced root system can no longer support. You might want to scan the first page or two on that forum for FLF threads, but meanwhile I'll ask a few questions: Does the pot have a drain hole? How do your water--on a schedule, when the top of the soil is dry, or when the soil at the bottom of the pot is dry? Do you give it a fixed volume of water, or water until it drains freely from the pot? Does the pot ever sit in standing water? What kind of soil are you using? Have you potted up (put the plant in a bigger pot with new soil around the existing rootball) or repotted it (removed all old soil from the roots, pruned errant roots, and replaced the soil with all new mix)?

Should always water as the plant needs it and never on a set schedule. What type of soil are you using? Does the pot have drain holes? while lengthy, the two posts below will help you a get a better understanding. The first being primarily about Ficus Benjamina. However, your Ficus Lyrata has the same exact cultural needs. http://forums2.gardenweb.com/discussions/1476078/ficus-trees-in-containers-iv?n=223 http://forums2.gardenweb.com/discussions/2842847/container-soils-water-movement-and-retention?n=8 Lastly, you may not get much help in this section. This is for edible figs.

All the foliage symptoms you describe - yellowing leaves, drooping, browning, dropping - are caused by the roots not being happy. They need oxygen as much as moisture, but in a closed pot the bottom layer becomes saturated and anaerobic when you water, and roots in that zone die back. Then as the soil dries the plant puts its energy into regrowing those roots, only to die back again at the next watering. Also in a closed pot any excess or unused minerals and salts from fertilisers and water will build up, with nowhere to be flushed out. This can cause imbalances and toxiticies and interfere with the roots ability to absorb water by exerting an osmotic pull the other way. You may be able to reduce these negative effects by not watering until the soil at the bottom of the pot dries (as judged by inserting a wooden chop stick or skewer, like checking a cake), watering very sparingly when you do, and using mineral-free water like rainwater or distilled water to reduce the mineral/salt buildup. Doing all that may keep it alive for longer but it's not going to be thriving, and FLF's with all their big leaves don't look good if they're not thriving. Plus you'll get sick of worrying about it - takes the fun out of it!