It looks good. The new shoots will green up as they grow, should just be a week or two,

Ya, that's what I thought, but they've been looking like that for at least 2-3 weeks now. Should I be more patient? Thank you!

Yes, give it some more time, it should be fine. Are you're fertilizing as well?

I fertilized it mid Feb with osmocote plus and plan to fertilize it again in May. Hopefully it just takes time, fingers crossed.

Looks like normal Mandarin flush growth to me. Give it more food; - now is the time to feed it lots of food and water.

That's good to hear, thanks! I guess I worried too much after comparing this tree to my other citrus. It is comparingly much weaker, will try to boost it with some miracle grow - my "secret" quick fix for all my plant problem.

Here's how the leaf on those new growth looks like now, still doesn't look healthy to me. I did some search and seems like iron deficiency. What do you guys think?

it this the new growth that fell? is the tree in a pot or in the ground. My first impression is it did not get enough feed and perhaps water during the flush. I could be wrong.

I pinched them off since they are so so ugly...the tree has been in ground for 2 years and it constantly been having problems - aphids, sooty molds, water sucker, etc etc. I've been fertilizing it with miracle grow since my last post but hasn't shown much inprovement. I'll probably dig it up and toss it soon.

Could provide a much better description of its surroundings? Like pics of the soil? pH of your soil? If it is surrounded by other trees? Cement walls? Maybe dig a foot down and take a pic of the soil in your hand? Do you spray that tree with anything or anything lately?

The roots are definitely not happy if that is not fertilizer burn or some sort of chemical burn...

Let me upload a picture later once I get home. But it is in heavy clay soil (never tested the ph), it's not surrounded by anything, and I sprayed with neem oil after the leaves looking weird. Is this enough info? Thank you!!!

Neem oil will burn those new leaves like that, and I mean burn them to a crisp, not only make them fall off. I would stop using that stuff on any very new foliage or buds..How much did you mix and into what? Did you mix soap too?

Why not use a good Horticultural Soap or an all Season's Dormant Oil and spray after the sun strongest angle and then spray the leaves down with fresh water the next morning?

Please take more than one pic, many more, please...But I think the oil got the best of that poor growth...

Thanks Mike, I started using neem oil as it is highly recommended by a YouTube person who gardens in California and all his trees look great. It is also organic, which is a plus. I haven't really looked into Horticultural Soap or all Season's Dormant Oil at all. Are they better?

Here are some pictures of the soil and the poor tree

I don't pity you with that soil. Without confirmation I would assume it is high pH; and over 7.5 citrus do not absorb critical elements, especially iron. You can apply chelated iron in the short term. Longer term I would dig in some gypsum to increase water absorption/holding; and some soil sulfur to lower the pH; both of these take a while to kick in; but should make for better results; you probably should have amended your soil with these and maybe some peat and perlite when you planted.. Meanwhile I would try spraying with a good foliar food with Iron, Magnesium, Calcium, Zinc, Manganese.

Hmm most web sites I read recommend not to amend the soil when planting. Thanks for the tips as I'm trying to learn. Not need for pity

Most soils do not need to be amended; and most are better if they are not. The exception is heavy clay, high pH soils; you CAN grow citrus in them; but you would have a lot more success if you amend them.

Thank you so much, it makes sense. I'm buying some gypsum, sulfur, and soil tester right now.

keep-on... that sounds like a good plan! I have a couple of friends who have tried to grow citrus in the San Jose area - and gave up. They found out that the soil was too alkaline. They chose to grow something else rather than adjusting with sulfur and feeding with ammonium sulfate containing fertilizers. Your tree looks very underfed to me. Run the calcs... have you truly worked in the recommended amount? (I double as a safety factor, especially if there is competing landscape and mulch). OsmoC+ is 15-9-12, so if you want to get 1/2 lb of N to the tree annually (per reco charts) x2 for soil / tree uptake and less than ideal conditions, - therefore, you will need 6.66 lb. of OsmoC+ over the course of the year.

Wow, 6.66lb per tree per year? I used probably 1/2lb to 1lb per tree per year... I will give myself 1-2 years to hopefully improve the health of my trees, if not, I will join your friends and give up on citrus

Do not pinch off the tips or leaves just because they look bad! With the proper care, then can recover. By pinching off the leaves, you are wasting the energy that your tree put into growing them.

From your last picture, I didn't think that your tree looks too bad. Give it some proper fertilizer with sufficient micro-nutrients, water as needed, and then sit back and give it some time!

Thank you everyone for your advices, all of them are very helpful! I'm going to do what John suggested - soil amendment and foliar spray (already bought everything based on his comment). Additionally, add more fertilizer as everyone else suggested. Fingers crossed!

Ammonia sulfate may help. I use it to lower pH, and it's very high instant nitrogen. It's also really cheap, 20 kg bag for $10.

The top 2 pictures look like normal growth. Do not pinch the growth off. I have 3 Mandarins and that's what the new growth looks like. I also am in 9b here on the gulf coast of Florida. I have never experienced damage from 30 degree nights. I usually get damage around 17 to 24 degrees. Are you sure it was frost damage? Mandarin is one of the more hardy cold weather citrus. In my experience, frost damage turns black within 2 weeks. We had a frost after bloom a month ago, it hit 29 and I had zero damage. When I started growing citrus, I was shocked at the amount of fertilizer they take. I though I would kill them, until I got them on a consistent regiment, now I have gorgeous trees.

The second photo, like someone else said is oil burn, not frost damage. Your tree just need the correct nutrients, don't toss it yet.

Thanks Michael, thanks for sharing the pictures. Your tree is gorgeous! My tree is nowhere near there... I do have a couple healthy citrus trees so I have some ideas what healthy growth looks like. There're definitely some issues with the soil and everything else. I've gotten lots of great advices here so I hope to see the tree improves with time. Thanks again!