ASPARAGUS - When spears are 6-8 inches tall, snap off at ground level. Allow all spears to "fern" after 4-6 weeks of harvesting.
BEANS - Check daily and pick young rather than with seeds bulging. Pods should break easily with a "snap".
LIMA BEANS - When pods are full, light green before any yellowing.
BEETS - Harvest "greens" when thinning and watch for beet at soil line. Harvest at size you prefer.
BROCCOLI - When green buds of the young flower head are size of a match. Homegrown doesn't reach supermarket size, so don't wait.
BRUSSEL SPROUTS - Twist lower sprouts off when green and about an inch or so in diameter.
CABBAGE - When head feels full and solid. If overripe, it will split.
CARROTS - When visible at soil line - about 1-2 inches long. Light frost improves flavor.
CAULIFLOWER - When "curds" of head are still smooth. Will be smaller than market heads, so don't wait.
CELERY - Three months after transplanting. Cut at base just beneath crown.
CORN (Sweet) - Kernels in milk stage. About 3 weeks after silks form and are dry and brown.
CUCUMBER - Check daily and pick immature for best taste. When past their prime, fruit turns yellow and seeds are dark.
EGGPLANT - Pick young, while fruit has a glossy skin. Overripe fruit have brown seeds and dull skins.
JERUSALEM ARTICHOKE - Dig tubers 6 weeks after flower fade and drop.
KALE - When leaves are rich green and firm. Cut frequently. Cold weather may improve flavor.
KOHLRABI - When plant is 2-3 inches in diameter. Becomes tough and bitter as size increases.
LEEKS - 11-12 weeks after transplanting - about 1 inch in diameter.
LETTUCE - When head feels firm or just before hot weather as they will bolt to seed. Leaf lettuce can be harvested by the outer leaves throughout the summer.
MUSKMELON - When spaces between the netting turn beige and the fruit "slips" from the vine when lifted gently.
ONIONS - Pull scallions when preferred size or allow to develop until tops fall over and ripen. Dig and allow to dry in the sun.
PARSNIPS - Flavor improves after a few frosts. May be mulched heavily for winter and dug in spring.
PEAS - Feel pods for solid peas or eat one off the vine for sweetness.
POTATOES - When tops have dried but before the first heavy freeze. When digging avoid skinning and exposing tubers to light.
PUMPKINS - Cut with stem. Before heavy frost, remove from field.
RADISHES - 3-6 weeks after planting. Goes to seed in hot weather.
RHUBARB - Pull outer stems as they reach size but discard poisonous leaf blade.
RUTABEGA - 3 months to maturity or when about 3 inches in diameter. Better flavor after frost. Can be mulched and dug as needed.
SWISS CHARD - Cut outer leaves 1-2 inches from soil leaving center to continue growing.
SPINACH - Cut at soil line before seed stem develops.
SQUASH (Summer/Zucchini) - Pick young fruit before skins are too tough to be broken by pressure of thumb nail.
SQUASH (Winter) - Look for appropriate color and cut with stem before heavy frost.
TOMATOES - When fully ripe or harvest when slightly green and ripen inside at 70 degrees F.
TURNIPS - When 2-2 1/2 inches in diameter at soil line. Become woody when overripe.
WATERMELON - When flesh on bottom is deep yellow and makes a dull, hollow sound when thumped.