It the upper portion of the plants look o.k. and the yellowing is confined to the lowest leaves, that’s a common occurrence. I remember seeing a somewhat technical explanation suggesting the plants may begin to draw nutrients from the older leaves. I don’t know if this is accurate but it happens every year on mine, some varieties more pronounced than others.
Phil I assume by the Oriole your in or near MD. I’m over the boarder in WV and got that rain. I was afraid of over watering too because I’m using planters. However mine are doing great. It is the first year so the garden soil is fresh, so plenty of fertilizer.
Yep, I’m in MD, and I’m also using planters. This is the second year with this soil, so I expect I’ll have to add some nutrients this year.
+1 Also, once the vines are about 5 feet tall, I trim of much of the green (and sometimes yellow) leaves from the bottom foot or so. Reduces bugs, and gives better airflow so mildowing is reduced. Can’t remember where I read this.