Your tree looks fine although the curled leaves may be due to over watering. I say that because watering twice a week seems excessive especially since your soil looks like it probably retains water too long.

Before watering again, use your fingers to dig down a couple of inches to feel if the soil is moist If it is moist, hold off on the watering.

Consider repotting into a mix that drains better, like 5-1-1 or gritty mix.

Fertilizer spikes aren't really recommended as it may be too strong for the roots to handle. If that was the only type of fertilizer available, I would take the spike, crush it and sprinkle the crumblings on top of the soil.

I think you have spider mites

Your new leaves seem to be rubbed of the new shoot when they are very young

Leaves have been removed here when they were very young. Neem oil to instructions will take care of this.

Thanks for the info guys! I think I'll take spikes out and crush it to sprinkle on top of soil. I believe the soil mix was citrus mix.

For spider mites, how do I know if it is actually pest? I have looked all around the plant closely but see no sign of pest. Are they just really small and hide well?

Denise, I am concerned that crushing the spikes and sprinkling on top of the mix will result in an increased concentration of fertilizer due to an increase in the surface to volume ration of the fertilizer pieces. This might cause fertilizer burn.

Geoffrey, if you are concerned about the spikes, just remove them and use a fertilizer solution instead. Spider mites are barely visible by eye. You might see tiny webs. Try using a magnifying glass to see the mites. You can use a spray of water to dislodge them or kill them with a miticide.

I was thinking of that too. It has three small spikes (designed for indoor container) to the instruction so I may remove one or two spikes and it'll balance better.

I looked up info on neem oil and just bought it because it seem like its it's the safest way to harm tree lesser and remove insect.

Also earlier today I thought I saw a speedy fly so its it's probably gnats. Were in high gnats season right now so some of them got indoor.

UPDATE: Look like spider mite went away with MiteX. I applied Neem oil but it doesn't seem to do the job on Oct 12th. I used MiteX around Oct 25th.

Seem like it's doing better but leaves and newly blooms flower kept falling off! Is this natural process or is it still stressed?

Winter is here in Moscow, ID so it has been indoor with grow lamp about 1 and 1/2 feet above tallest branch.

Watered when top of soil is dry

Fertilizer spike should doing it job. There is currently two in the soil from September.

Flower turning dry and about to fall down.

More flowers, they may fall down too.

Bare branch from leaves falling off

Let me know what are the opinions!

Bump, 3-5 leaves are still falling and bottom small branches are dead brown. May trim later when the plant isn't stressed. I still have no idea what to do other than keeping watering schedule right. Should I switch to liquid fertilizer?

If you are in Idaho, the temps have been pretty cold there and the climate is pretty dry, so indoor heating can dry out the air inside and negatively impact the plant. Spider mites thrive in dry warm conditions so if possible, you may want to increase the humidity around the tree with misting and/or using a pebble tray with water positioned beneath the plant (can prop the pot on top of the pebbles in the saucer so the pot can drain when watered) and/or consider a portable humidifier. Since you sprayed different things to take care of the mites, the sprays probably impacted the blossoms, which is probably why some are dropping.

I also expect the tree is reacting to a lack of light too based on indoor temps. You might want to get a thin wooden rod/stake or dowel and stick down deeper into the soil to see if the bottom is still wet regardless of how dry the top might appear. That may be a better indicator for how often to water.

Thanks! Do you think placing some kind of humidifier will help? There are tray bottom of pot to catch water indoor. Maybe I could fill it up too?

Thanks for the head up, I wasn't pay attention to the basic plant oxygen cycle haha.

You can spray your tree good with just warm water once a week. I spray my trees in the bathtub so no mess on the floor.

Can anyone recommended me a light bulb on amazon? I have Satco bulb but they kept blewing out under 100 hours when they say it'll last 2000 hours on box. LED light have been showing up on varied discussion but I'm not sure which one to trust on amazon.

I can't find the thread on which Laura and other members mentioned the lights they are using. I am using these lightbulbs from my nearby store for my younger trees and grafts, they work well for me, using them for the second year

CFL Flood

will this work?

https://www.amazon.com/gp/product/B01FWZVBIC/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

Look like it's doing better but new leaves are falling as they grow. A few new stem snapped off as well. I've been watering once a week when soil are dry. Misting once a week with warm water. Small amount of liquid fertilizer feed once a month. I built mini fence around it to keep my cat out too!

New flowers/fruits have been falling. Not one has stay on to grow bigger in size.

Winter has been bit harsh but we've been having a lots of sunlight lately.

https://www.amazon.com/gp/product/B01FWZVBIC/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

I use this bulb with cone about 2' above topmost leaves. It's on timer from 6 AM till 8 PM everyday. Is this too much light when it's sunny outside? Plant is placed by south window.

I sprayed MiteX whenever I see them on gravel/rock maybe once every month. But not on leaves/flowers yet.

Soil is cactus/citric soil mix so it's fast draining. Pot size is appox 2'x2'x3'

Any more ideas to help this poor plant out?

A few leaves started to curling

Best part of new stem, this may disappear :(

Middle, all leaves fell off the new stem.

Bump, I got back from a break. Look like half of the new leaves stayed and other half of stem dried out.