Plant Problems — Causes, Fixes & Prevention

131 common garden problems across 26 plants. Each guide lists symptoms, typical causes, fixes and prevention — based on widely published extension-service guidance.

Apple — 5 problems

aphids brown rot rust scab no fruit

Basil — 5 problems

yellow leaves bolting leggy downy mildew black spots

Green Beans — 5 problems

blossom drop rust yellow leaves few pods aphids

Blueberry — 5 problems

yellow leaves no fruit leaf spots root rot birds

Broccoli — 5 problems

no head yellow leaves cabbage worms loose heads leggy

Carrot — 5 problems

forked roots cracked roots bitter taste hairy roots slow growth

Sweet Corn — 5 problems

missing ears rust corn borer lodging poor kernel fill

Cucumber — 5 problems

bitter taste powdery mildew misshapen fruit yellow leaves no fruit

Hydrangea — 5 problems

wilting leaves not flowering yellow leaves mealybugs leaf spots

Kale — 5 problems

holes in leaves yellow leaves curling leaves white mold bitter leaves

Lettuce — 5 problems

bolting bitter taste leggy yellow leaves leaf tip burn

Marigold — 5 problems

not flowering powdery mildew yellow leaves spider mites root rot

Mint — 5 problems

rust spreading yellow leaves aphids brown edges

Onion — 5 problems

bulbs small bolting yellow tops neck rot pink root

Peas — 5 problems

powdery mildew yellow leaves few pods aphids root rot

Pepper — 5 problems

blossom drop curling leaves sunscald small fruit yellow leaves

Potato — 5 problems

late blight green tubers yellow leaves scab hollow heart

Pumpkin — 5 problems

male flowers powdery mildew fruit rot no pollination vine borer

Radish — 5 problems

too hot no root cracked holes pithy

Rose — 5 problems

black spot powdery mildew aphids yellow leaves not flowering

Spinach — 5 problems

bolting yellow leaves downy mildew leaf miner leggy

Strawberry — 5 problems

gray mold small berries leaf spots no fruit birds

Sunflower — 5 problems

heads droop rust yellow leaves birds seeds mildew

Swiss Chard — 5 problems

yellow leaves holes bolting leaf spots tough leaves

Tomato — 6 problems

not flowering yellow leaves cracking blossom end rot leaf curl blossom drop

Zucchini — 5 problems

male flowers only powdery mildew fruit rot yellow leaves squash bugs

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