what's wrong with my star jasmine?

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I have had lovely star jasmine either side of my front door for about 10 years. On side is still green and lush, the other side looks brown, withered and dying. What's happening?

Needs a feed?

Sound like one didn’t get enough water. Or if in a pot might have vine weevil.

Me too. One is thriving. The other has had it. Infuriating. Same compost, feed, situation. Hey ho. The joy of gardening.

I think it didn't get enough water. Water it regularly and try to also add some fertilizers.

could be vine weevil or other root gnasher. But both pots have a pyracantha, some hidcote lavenders and begonias, all fine. I'll have to empty the pot and change compost and buy another Jasmine.