Ask-a-Dave's-Gardener: what is wrong with my raspberry plant??, 1 by Interrobang

Interrobang wrote:
i bought a little raspberry plant and planted it in my indoor/outdoor planter and used all new potting mix. it was fine for maybe a week, producing several new leaves, but now several of the leaves are turning gray from the tips. the tips seem dead but theyre not dried out and crispy when i pinch them. the planter that theyre in is a self-watering one with a reservoir in the bottom but ive also been watering from the top with a watering can because i have some herb seeds im trying to sprout just below the surface. have i been overwatering my poor little raspberry and what should i do to save it?