VEGETABLE ROOT DEPTH – TO GAUGE WATERING DEPTH Sources: UC Small Farm Program; NCCE Agriculture; AZ Master Gardener; Stephen Albert, garden writer and teacher, Sonoma, CA Compiled by Master - PDF Document

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  1. VEGETABLE ROOT DEPTH – TO GAUGE WATERING DEPTH Sources: UC Small Farm Program; NCCE Agriculture; AZ Master Gardener; Stephen Albert, garden writer and teacher, Sonoma, CA Compiled by Master Gardener Florence Nishida, September 2011 Depth: S = 18”- 24” (36”); M = 36”- 48”; D = >48” Artichoke Arugula Asparagus Beans Beets Bok choy Broccoli Brussels sprouts Cabbage Carrots Cauliflower Celery Chard Chiles Collards Corn Cucumber Eggplant Fava bean Fennel Garlic Jerusalem artichoke (sunchoke) Kale Kohlrabi Leek Lettuce Mache Mustard greens Napa cabbage New Zealand spinach Onion Parsnip Peas Peppers Potato Radish Rhubarb Rutabaga Spinach Squash, summer Squash, winter Strawberry Tomato Turnip D S D M M S S S S M S S M M S S M M M S S S S S S S S S S S S D M M S S D M S M D S D M 48”+, perennial 12-18” 6-8”, perennial 24-36” wide spreading 18-36” 12-36” 18-36” 18-36” 12” 18-24” 18-36” 18-36”, biennial/annual 36-48”, biennial/annual 18-48”, annual/perennial in tropics 18-24”, biennial 18-36”, 36-48” 36-48”, annual/perennial in hot regions 36-48” 12-18”, perennial/summer annual 12-18” 12-18”, perennial 12-18”, biennial/annual 12-18”, biennial/annual 18-36”, biennial/annual 18” 3-6” 18” perennial/annual 18-36” annual 10-24” biennial/annual 8-12” 48” biennial/annual 36-48” 36-48” 18-24” perennial/annual 5-8” 36-48+”, perennial 24-36” biennial/annual 12-18” 12-18+” 12-24+” 12-18” perennial 18-48” perennial 18-24” biennial/annual

  2. HERBS Basil Chive Cilantro Mint Oregano Parsley Rosemary Sage Summer Savory Tarragon Thyme WATER NEEDS: Give plants up to 1.5” water/week as needed during hot periods for plants with a spread of 12” or more. During cooler seasons, ¾” water/week may suffice. For small seeds (planted ¾” depth or less), immediately after planting the seed, apply from ½” to ¾” of water (in the planting bed) to settle the soil and to start seed germination. For larger seed crops, water a few days prior to seeding, as well as water to a depth of 2 or more inches after planting the seeds. Transplants need good soil moisture. Water a few days prior to transplanting. A light watering of ½ to ¾” will help young roots after transplanting. It is important that the soil has sufficient moisture for seed germination and good root growth. Frequent, light irrigations result in shallow root systems which are easily stressed in dry periods. Deep, infrequent watering is better once plants are established. S S S S S S S/M M S S S 8-12” 3-6” perennial, divide every 3 years 8-18” 12-18” perennial, plant in a pot 6-18” perennial 8-12” biennial/annual 12-24”+ perennial 24-36” perennial 8-12” 6-10” perennial, divide every 3 yrs 6-10” perennial