Answer: It's difficult to determine from your description whether there's a nutritional problem with your abelia's or if only the new foliage is lighter in color than the rest. If it's only the new foliage that's more yellow than the rest, it should become a darker green/yellow as it matures. If the entire plant looks yellowish, you might want to feed your shrubs. Use either a liquid or granular all-purpose fertilizer (20-20-20 is a good balance) and apply in amounts as listed on the label. You should see an overall difference in the foliage a few weeks after feeding. Best wishes with your plants!
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