English Ivy plant dying, with white spots at the base

Question

I have a four to five year old English Ivy plant with up to 10 feet (3 m) long vines.

Three months ago I changed its pot and it remained healty for a while. Now, all of a sudden, its branches have started to dry out and die one by one. There is a strange white covering (not sure if it's fungus) just at the base of all the branches. I tried spraying hydrogen peroxide at the base but that hasn't helped.

When I repotted it three months ago in a bigger pot I used as soil a potting mix by Miracle gro. The pot has drainage holes in the bottom. The plant is indoors near a window but with indirect sunlight. I water around once a week when the upper soil is a little dry and let the excess water drain out (same as I have been doing for years).

Any suggestion would be appreciated.

Some More Pictures:

Update:

All the branches dried out. I cut of a couple of junctions covered with fungus but couldn't find any turd capsules like stuff. So this might not be Sclerotinia. See these pictures:

Answer 1

Sclerotinia White Mold

This plant is not looking like a keeper. I am worried this might be Sclerotinia.

I can't see them but I get the feeling that you have spider mite as well. Not the deal breaker Sclerotinia is however.

Please send a few more pictures, Ashar. If this is Sclerotinia you need to dispose all the soil and plant in a thick plastic trash liner. Clean that pot with major bleach before ever using it again.

Miracle Gro soil should have been sterilized. Did you add any compost or unsterilized soil/ingredients when you repotted? Did your soil contain fertilizers? How about water holding gimmicks such as sponges or gels?

Your soil looks too wet thus contributing to fungus. You said that you water once a week or so when the top of the soil is dry? Which is good. Better would be to test the weight of the pot to see if it needs water. That is how I do it anyway and it works. Water at 8 pounds per gallon is heavy. Lifting a pot when most of that water is gone is a very marked difference.

Check out this article although I am having a hard time imagining where you would have picked up Sclerotinia. Might not be Sclerotinia which is one of the worst diseases to contract...and it is a fungal disease. There are other types of fungus that are white like this. It would be nice if you could do a bit of an operation?

Looking at this picture, cut off the branch coming towards the viewer from the trunk of this plant. Sclerotinia would have these rat turd looking capsules in that joint. Please get a magnifying glass and look at the leaves, the greener leaves, on their undersides. Look closely at the junctions of petiole stems and the leaves for fine fine webbing.

A weakened plant will be susceptible to insects and disease. If you have to lose this plant, let's make sure of this ID and the problem so you never have to repeat. A picture of the entire plant, please? A close up of the leaves? And a close up of that juncture with the stem cut off the trunk.