Fix My Plant

let's figure out what's going on

Something not looking right? Pick the symptom that best matches what you're seeing and I'll walk you through the most likely causes, how to fix them, and how to prevent them next time.

What's Your Plant Doing?

Pick the symptom that best describes what you're seeing.

Yellow Leaves

Leaves turning yellow from the bottom up, or all over

Brown Spots

Brown or dark spots appearing on leaves or fruit

Wilting

Plant drooping or wilting even after watering

Not Fruiting

Lots of flowers but no fruit, or fruit dropping early

Slow Growth

Plant seems stunted or growing much slower than expected

Pests

Bugs, holes in leaves, sticky residue, or webbing

White Coating

White powdery film or coating on leaf surfaces

Curling Leaves

Leaves curling inward, upward, or downward

Lush, healthy raised bed garden thriving with proper care

this is the goal

Every plant problem has a solution. Let's get your garden looking like this.

Colorful harvest basket showing what healthy, well-cared-for plants produce

White Coating

That white powdery coating on your leaves is almost certainly powdery mildew - one of the most common fungal diseases in the garden. The good news is it rarely kills plants, but it weakens them and reduces harvests. It's especially common in late summer when days are warm and nights are cool.

Most Likely

Powdery Mildew

Address soon

A fungal disease that creates a distinctive white, powdery coating on leaf surfaces. Unlike most fungi, powdery mildew thrives in DRY conditions with moderate temperatures (60-80F). It needs humid air but dry leaves.

What to Look For

  • White, powdery or flour-like coating on leaf surfaces (top side usually)
  • May start as small circular white spots that spread
  • Affected leaves may curl, distort, or turn yellow underneath
  • Common in late summer and fall
  • Worse in shaded areas with poor air circulation

How to Fix It

  1. 1Spray with neem oil every 7-10 days
  2. 2Baking soda spray: 1 tablespoon baking soda + 1 teaspoon liquid soap + 1 gallon water
  3. 3Milk spray (yes, really): mix 1 part milk to 9 parts water and spray in sunlight - it works!
  4. 4Remove heavily infected leaves to slow spread
  5. 5Improve air circulation by pruning dense growth and spacing plants apart

Prevention

  • Space plants for good air circulation - crowded plants get mildew first
  • Water in the morning so foliage dries quickly
  • Choose resistant varieties (look for 'PM resistant' on seed packets)
  • Don't overhead water in late afternoon/evening
  • Preventive neem oil sprays every 2 weeks starting mid-summer
Most affected:Squash and cucumbers (extremely common), peas, beans, zinnias, roses

Still Stumped?

Send me a photo and description on the Garden Hotline. I love a good plant mystery.

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Fix My Plant - Plant Problem Troubleshooter | Harvest with Liz