What I think is, a very large % of issues that people come here looking for solutions for, are related directly to the results of soil choice and either the watering habits necessitated by those choices, or just plain poor watering habits. Because choosing a soil that supports little or no perched water makes it difficult for a grower to water poorly (unless they just don't water) most of the blame for poor watering practices is rightly assigned as the result of the dilemma excessively water-retentive soil present the grower. Do I water thoroughly enough to flush the soil of accumulating salts and risk the soil remaining wet for so long it affects root health/function; or do I water in sips, so the soil is appropriately moist, and suffer the consequences of a build-up of solubles in the soil. For me, it's a no-brainer. I want the soil that allows me to water appropriately any time I want to, without my having to worry about the soil remaining wet for so long it affects root health/function - no worries about root health - no worries about salt build-up ...... what's not to like? It's easy to suggest that inappropriately evaluating the level of soil moisture is the cause of these problems, but when you look realistically at the issue of how difficult it is to maintain adequate aeration in soils that support perched water, we see clearly that the bulk of the blame lies with a soil's measure of water retention, and more specifically with the ht of the perched water table. Even when you use small sips of water to water soils that support significant volumes of perched water, the water tends to accumulate at the bottom of the pot - not to mention the fact that watering in sips very often leaves the root mass dry in some places and too wet in others. IOW, it's extremely difficult to keep soils evenly moist when they support perched water. The norm is a layer of soil at the bottom of the pot that remains soggy until the water is used. It's DURING this period when the soil supports too much water that root death and depression of root function occurs. Neither of these things are desirable and should be avoided whenever possible. One robs energy from the plant because the plant has to expend energy to replace lost rootage, and the other inhibits the plant's ability to function normally. Well-aerated soils that support no or minimal amounts of perched water, do away with these negatives entirely, and offer the grower much greater latitude in the areas of fertilizing and (over)watering. ****************************************************** There are 2 ways to look at growing. Placing grower convenience at the forefront will find you growing much differently than if you place the plant's well-being foremost. Neither way is right or wrong, it's just two different ways of looking at growing. One grower might look at 'what to do with the effluent after watering a big plant in the gritty mix' as an insurmountable obstacle because it requires more effort than using a soil that absorbs and holds onto all that excess water. I don't look at it as an obstacle at all - just something that needs to be dealt with in my pursuit of maximizing plant health. Large plants are set above drainage saucers on small blocks, so after the effluent leaves the pot it cannot find its way back into the soil. All my plants, even the small ones, are watered so 15-20% of the total volume of water applied exits the drain. The effluent goes into the drainage saucer and evaporates - usually within 2-3 days, depending on the weather (humidity levels). If, for some reason, it didn't all evaporate between waterings, I'd make a note of that and remove some of the water with a turkey baster or similar after watering. So far, that hasn't been an issue. Al

leaf tips are dying/dead.. .not much you can do, but it does not mean the whole leaf will die... but if continues down leaf (leaves) I would cut off the bad tissue and apply and anti fungal to the cut edges. Keep plant warmer.

Just looks like salt burn from a build-up of salts from your fertilizer combined with a heavy slow draining potting mix. I am not a container guy; but some here will give you better advice. BTW your tree looks fine... don't stress... few leaves are perfect.

That looks physiological to me, not pathogenic. There are a couple of possibilities, depending on what you do with your plants. Some nutrient deficiencies can look like that; magnesium, potassium, maybe molybdenum. If you haven't fed them recently, or if you have been feeding them a straight NPK food and your soil isn't the best, consider supplementing with a complete fertilizer or tonic, one which has trace minerals. (I'm fond of Superthrive for hard-to-pinpoint problems like this.) Low pH can also mimic nutrient deficiency. It could be fertilizer burn, though it's not perfectly typical. If you've been feeding them a lot, lay off for a bit and see whether it resolves. The last possibility I can think of is spray burn. Sulfur and some oils can burn foliage at high temperatures (over 85F) and even simple soap at high concentration can burn; it's common for the tips of the leaves to get higher concentrations of the spray as it runs off. You didn't mention any earlier sprays, but if you have done any, watch your temperatures and try to get an even spray without a lot of runoff. Don't mix different sprays together, either. I don't suspect a fungus because the yellowing pattern is so regular, and the dead patches are in the center of the yellow areas which speaks of it either being the center of the toxicity/deficiency, or being a victim of sunburn as the leaves get too pale to handle the sun. I hope some of that helps. :) --Alison