What is this on my overwintering grape vine?

Learn More About
Concord Grape Care

• 🌟 Benefits
• 🐝 Pollination
• 🏡 Landscaping Ideas
• 📍 Where to Plant
• 🫚 Roots
• 👥 Companion Plants
• 📈 How to Grow
• 🧑‍🌾 How to Plant
• 🌐 Hardiness Zone
• 🗓️ When to Plant
• 🍂 Black Spots on Leaves
• 🤔 Problems
• 🐛 What Eats
• 💩 Fertilizing
• 💨 Humidity
• ✂️ Pruning
• 🥶 Winter
• 🪴 Repotting
• 🪴 Soil
• 🏺 Best Pot
• 🔄 Lifecycle
• 🌱 Varieties
• 🤒 Root Rot
• 🌡️ Temperature
• 🐞 Bugs
• 😞 Wilting
• 🥀 Flower Problems
• 🍃 Leaves Curling
• 🍃 Leaves Falling Over
• 🌻 Annual
• 🍃 Leaves Dropping
• 🌞 Direct Sunlight
• 🌤️ Light Requirements
• 🏞️ Care Outdoors
• 🔍 Weeds
• 🌳 Perennial
• 📏 Size
• 💦 How Often to Water
• 🧪 Propagating
• 🌸 Flower
• 🍃 Leaves Drooping
• 🍂 Leaves Mushy
• 🍂 Yellow Leaves
• 🍂 Brown Spots on Leaves