Small brown/yellow spots on edge or tip of leaves (house plant- anthurium ) becoming larger and eroding into the leaf, leaving dry papery brown areas. Help - not lack of water or overwatering !!
It sounds like fungal leaf spot. If possible, trim away the infected leaves and make sure the leaves stay dry. Normally this issue will clear up on its own if you do this. I would keep it away from other plants, however, as it can spread.
I have planted Anthuriums in a plot of 12 feet by 8 feet - about 12 of them. These were transferred from pots. Is the area too big for the plants? Should I put them back into the pots and bury them in the plot? The place is facing north, and is covered both on east and west, so no direct sunlight.
This area is just fine for the plants. They do not need to be in pots if you are planning on keeping them in the ground.
I need to know if some plants have to be protected against cold. The Anthurium and the pony tail, for instance. I don't know the botanic names. Is there a list of plants that need protection against frost available?
Unfortunately there is no complete list of plants that need frost protection. Your best bet would be to type in the plant's name into Google followed by the word zone or hardiness and this will bring up results that let you know how much cold the plant can tolerate.
Why will my anthurium plant not bloom?
This article will help you:
I purchased an Anthurium last fall, which was doing fine til recently. . . noticed the leaves had brown through them and today several are shriveled and drying. The plant came already growing on a piece of lava, so I put it on a bed of decorative pebbles which sat in a bowl of water. The roots seemed to grow down into the water which I kept filled so it wouldn't dry out.
Have you fertilized it at all. They need only a very light fertilizer high in phosphorous, but if you have not given any fertilizer, it may need a little to help it.
It sounds like you are growing it in an almost water based medium, so try giving it just a little fertilizer once every other month so it can get the nutrients it would normally get from soil.
I've over-watered my anthurium and the lovely plant is drooping more by the minute. I've taken it out of the potting medium and left the roots to dry out a bit but the poor special baby is looking like death. Please help if you can.
If it has not developed root rot as a result of the overwatering, you can cut back watering and the plant will most likely recover. If it has root rot, you may be best getting a new plant. At any rate, this article will help with root rot: https://www.gardeningknowhow.com/plant-problems/disease/treating-root-rot-gardening-tips-for-housplants.htm
My white anthuriums are turning green. Should I cut them off? The red withers and dies but the white gets as green as a leaf and becomes hard.
Yes, you can try cutting these to prevent entire reversion of the plant. This article will help explain why this reversion occurs: https://www.gardeningknowhow.com/plant-problems/environmental/variegated-plant-problems.htm