We were given a plant with lovely white flowers and several of the tips of the leaves are brown. The article says it is easily fixed but does not tell how it can be fixed. Can you help define the remedy?
This article may help: https://www.gardeningknowhow.com/plant-problems/environmental/what-causes-brown-edges-on-leaves-of-plant.htm
Depending on the possible reason for the browning tips/leaves, there are several things you can try, as stated in the article. For example, you may need to improve drainage or increase watering.
I have some indoor plants, but none are growing very well.
You need to make sure they are getting the appropriate light and water for that kind of plant.
I have problems with my house plants: some have a waxy/wet look on the leaf. The soil gets a white ashey look to it when it's dry. Also, some plants have these little gnat-like flying bugs in the soil. What do I need to do for a healthier plant in both cases?
You have two separate problems. The white, ashy crust is made of salts that are built up over time fromwater and fertilizer. It's time to repot with fresh soil. As for your pest problem, you'll find the following articles very useful:
https://www.gardeningknowhow.com/houseplants/hpgen/pests-and-diseases-of-houseplants.htm
https://www.gardeningknowhow.com/houseplants/hpgen/common-bugs-and-pests-on-houseplants.htm
the wet sticky can be scale and the whole plant needs to be washed,or trashed.scale looks like little brown or white bumps on plant and need to be completely removed on plant and pot to kill.the alge gnats eat rotting plant matter in soil,you can repot the whole plantwith new soil or scrape off the first inch of soil, put down epsom salts then soil then salts again to kill gnats.
What fungicide would you recommend to eliminate mushrooms in houseplants? I have a dog, so want something harmless to people and pets. I think the mushrooms are lovely, but since we have allergies to fungus, I don't think it's a good idea to let the mushrooms continue to grow.
Neem oil is good. It is harmless to people and pets but is a good fungicide. This article will have more info:
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
What does it mean when some of my indoor plants turn brown at the end of the leaves?
This article will help you:
https://www.gardeningknowhow.com/plant-problems/environmental/what-causes-brown-edges-on-leaves-of-plant.htm
I have an indoor houseplant and it has what I think looks like a disease of some sort. It has white circumferential spots growing mainly on the stems, and there are increasing clusters of them covering most of the plant. The bases of the leaves are affected too, but the leaf itself mainly spared. It grows with a decent bit of sunlight during the day but isn't in humid conditions. Any idea what it is and how I can get rid of it?
It sounds like mealy bugs or scale. Spray the plant with neem oil, and this should take care of them. Here is more information:
https://www.gardeningknowhow.com/plant-problems/pests/mealybugs-white-residue-on-plants-leaves.htm
https://www.gardeningknowhow.com/plant-problems/pests/scale-bug-how-to-control-plant-scale.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
My indoor plant is placed near my window where there's lots of sunlight in the afternoon. Can it kill the leaves? I realized it turned yellow. . . I water the plant once a week.
It depends on the plant. You need to determine what kind of plant it is and what kind of light it needs. If it it getting too much or too little light, this can cause yellow leaves.