Q.Differences In Elderberry Stems
I have seen elderberry plants around and have noticed that some stems for the fruits are red and some are green. The fruits are ripe, but there is the color difference just in the stems. Just wondering.

Certified GKH Gardening Expert
Unfortunately, your photo did not come through. This can be due to temperature, phosphorous deficiency, or high pH, depending on how it appears, and what a soil test reveals.
Here are some articles that will help:
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm
https://www.gardeningknowhow.com/edible/fruits/elderberry/planting-elderberry.htm