I noticed today that the Chicago Apache fans to the left of my front walkway look like this:

I'd call it striation, but the leaves border on being striped. Also, many of the leaves are at least partially yellowed.

Here is the patch of Chicago Apache on the opposite side of the walkway:

It looks normal.

Does anyone know what this is? Can I "fix it" somehow? If not, is it only in the plants, or is it in the soil now too?

It looks like a micronutrient deficiency but that could just be because of cold. Do you know your soil pH?

sooby said:It looks like a micronutrient deficiency but that could just be because of cold. Do you know your soil pH?

I do not. I can use an at-home test kit, and follow up with full testing from the cooperative extension service.

I was unsure if it might be daylily leaf streak. That side of the garden has had other fungal incursions...including one that killed 3 hibiscus moscheutos bushes over 2 growing seasons.

It doesn't look typical of leaf streak, although leaf streak can follow cold (or other) damage. This picture is of a micronutrient deficiency caused by the pH being too high for a particular cultivar, although sometimes this sort of symptom clears up as the soil gets warmer:

https://www.daylilies.org/ahs_...

Yes, I often see that in my garden in early spring, then it just clears up as the season progresses.

sooby said:It doesn't look typical of leaf streak, although leaf streak can follow cold (or other) damage. This picture is of a micronutrient deficiency caused by the pH being too high for a particular cultivar, although sometimes this sort of symptom clears up as the soil gets warmer:
https://www.daylilies.org/ahs_...

I'll do the pH test tomorrow, and see what's what. I'm just a bit surprised that I'm only seeing this in one clump of Chicago Apache -- out of 6 in the ground and 2 in pots.

Thanks for the great info! Just curious...is a manganese deficiency something I can correct? Or does it just disappear once the pH is corrected?

It looks like spring sickness,It sets them back some but they will grow out of it,I don't think the experts are sure on what causes it.

MrKGDickie said:

I'll do the pH test tomorrow, and see what's what. I'm just a bit surprised that I'm only seeing this in one clump of Chicago Apache -- out of 6 in the ground and 2 in pots.

Thanks for the great info! Just curious...is a manganese deficiency something I can correct? Or does it just disappear once the pH is corrected?

Most often all you need to do is lower the soil pH if it turns out to be too high because most micronutrients are there but become less available to the plant as the pH increases. Sometimes there is a shortage of a particular nutrient but you'd need a soil test for that. Since you only have one plant with this yet you have other 'Chicago Apache' not affected there might be something else going on although a garden can have pockets with different pHs. If it could be a too high soil pH an easy test is to water the soil around that one plant once a week with no more than one teaspoon of vinegar per litre of water (I stress no more because stronger vinegar is herbicidal). If it is a pH problem then the inner leaf bases should start to look greener in two or three weeks.

'Chicago Apache' does sometimes get spring sickness to a mild degree in my garden, but I don't see any of the typical bending, stunting, ragged leaf edges etc. in the pictures.