Pick all vegetables when young. Not only will they taste better but the plants
will bear more.
Specific harvesting tips: pick corn when silks are brown; cucumbers are best
when slender and dark green; parsnips and carrots taste better after a sharp
frost; tomatoes taste best when dead ripe according to old timers. All root
crops should be picked in the morning, and all above ground crops in the
afternoon or early evening.