Baby Avocado in pot - browning leaves
I have a 3 month old avocado that has been growing happily in a pot until this past week or so. Now the tips and edges of its few leaves are browning. It starts at the tips and moves to include the side edges of the leaves. None have dropped yet, but I'm sure they will.
Have looked this up on here and other sites: folks have suggested more water (leaves brown, not yellow which means over watering) and too much salt in the soil. However, I've increased the water this past week to no avail. I also flushed the soil yesterday, but the leaves are even worse today. Others have suggested lack of humidity, but it's been EXTREMELY humid in NYC this past week, so I don't think that's it.
The plant does have new growth at the top, so seems heathy otherwise, and I checked the roots for root rot yesterday before flushing the soil. All looks good.
Any other thoughts or advice would be appreciated. I don't want to lose this plant!
PS Al, my calamondin is SO happy in your soil and is about to burst into its biggest bloom ever out on my fire escape! Thanks again!!