Good link from American rose society on nutrient def. and pests & diseases in roses:
https://www.rose.org/single-post/2020/06/16/Learn-to-Read-the-Leaves#:~:text=Molybdenum%20Deficiency%20may%20be%20indicated%20when%20the%20youngest,the%20cause%20of%20young%20leaves%20developing%20light%20edges.
From above link, "Molybdenum Deficiency may be indicated when the youngest growth shows wilting and there is tip scorching on the leaves." Also "Calcium Deficiency may be indicated when young leaves are distorted and older foliage become a dull green or curl down at the margins." Both molybdenum and calcium def. occur in ACICID condition. Poseidon used to have distorted newest leaves & dull green leaves with tons of acidic rain. So I put a few big limestone rocks around it, and NO MORE calcium def, plus leaves are thicker & glossier, see below:
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Antique roses
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