I've had my string of hearts for about a year now, and she's done great until now. Occasionally dropping leaves has been constant since I got her, but never a cause for concern. Now her leaves are turning yellow-ish, shrivelling and dropping off quite frequently. She's still putting out a lot of new growth, but the new leaves often drop off before they can really take hold. A lot of her leaves are still healthy, but a lot are quite a bit thinner than usual, and those are the ones I notice dropping off. Not sure what the cause is? Nothing has really changed since I got her, I repotted her right before fall so she's used to this pot, and I've added a couple succulents, but again that was quite a while ago and she should be used to all those changes. The other plants in the pot are thriving and much smaller than her, so I don't think it's that they're taking up all the nutrients from the soil or anything. I'm wondering if she's just suffering from a long winter? Hopefully she'll perk up again now that it's warm and sunny again, but I wanted to check in here and see if you guys have any thoughts or advice on what to do?