Please help my plant! I was given this crown of thorns stem cutting from my aunt, a beautiful little piece with flowers. Now the flowers are wilted and leaves aren’t doing well. I think I did the mistake of placing the cutting in a jar of water to grow roots, but learned they don’t really like water so planted it in succulent/cactus soil. But so far hasn’t sprung back up. Any advice or suggestions to get this plant to regain its vibrancy?