Sharp Rubber Duck

Resources

Resources for Growing Quality Medical Marijuana

Electro - Conductivity Chart

Electro - Conductivity (EC) or Conductivity Factor (cF) can be expressed as either millisiemens (mS), cF or parts per million (ppm).

Example: 1mS = 10cF = 700ppm

The pH and Electro - Conductivity values specified here are given as a broad range. It should be noted that different seasons and climate will alter the needs of your plant. As a general rule, in cooler grow rooms, the plant requires higher nutrients. With warmer rooms, the plant requires lower levels of nutrients.

Vegetable Crops L = Low     M = Medium     H = High

Product	pH	Category	cF	ppm
Artichoke	6.5 - 7.5	L	8 - 18	560 - 1260
Asparagus	6.0 - 6.8	L	14 - 18	980 - 1260
Bean (Common)	6.0	H	20 - 40	1400 - 2800
Beetroot	6.0 - 6.5	H	18 - 50	1260 - 3500
Broad Bean	6.0 - 6.5	M	18 - 22	1260 - 1540
Broccoli	6.0 - 6.8	H	28 - 35	1960 - 2450
Brussels Sprout	6.5	H	25 - 30	1750 - 2100
Cabbage	6.5 - 7.0	H	25 - 30	1750 - 2100
Capsicum	6.0 - 6.5	M	18 - 22	1260 - 1540
Carrot	6.3	M	16 - 20	1120 - 1400
Cauliflower	6.5 - 7.0	M	15 - 20	1050 - 1400
Celery	6.5	M	18 - 24	1260 - 1680
Cucumber	5.5	M	17 - 25	1190 - 1750
Eggplant	6.0	H	25 - 35	1750 - 2450
Endive	5.5	M	20 - 24	1400 - 1680
Fodder	6.0	M	18 - 20	1260 - 1400
Garlic	6.0	L	14 - 18	980 - 1260
Leek	6.5 - 7.0	L	14 - 18	980 - 1260
Lettuce	6.0 - 7.0	L	8 - 12	560 - 840
Marrow	6.0	M	18 - 24	1260 - 1680
Okra	6.5	H	20 - 24	1400 - 1680
Onion	6.0 - 6.7	L	14 - 18	980 - 1260
Pak - choi	7.0	M	15 - 20	1050 - 1400
Parsnip	6.0	L	14 - 18	980 - 1260
Pea	6.0 - 7.0	L	8 - 18	980 - 1260
Pepino	6.0 - 6.5	H	20 - 50	1400 - 3500
Potato	5.0 - 6.0	H	20 - 25	1400 - 1750
Pumpkin	5.5 - 7.5	M	18 - 24	1260 - 1680
Radish	6.0 - 7.0	M	16 - 22	840 - 1540
Spinach	6.0 - 7.0	M	18 - 23	1260 - 1610
Silverbeet	6.0 - 7.0	M	18 - 23	1260 - 1610
Sweet Corn	6.0	M	16 - 24	840 - 1680
Sweet Potato	5.5 - 6.0	H	20 - 25	1400 - 1750
Taro	5.0 - 5.5	H	25 - 30	1750 - 2100
Tomato	6.0 - 6.5	H	20 - 50	1400 - 3500
Turnip	6.0 - 6.5	M	18 - 24	1260 - 1680
Zucchini	6.0	M	18 - 24	1260 - 1680

Herbs

Product	pH	Category	cF	ppm
Basil	5.5 - 6.5	L	10 - 16	700 - 1120
Chicory	5.5 - 6.0	H	20 - 24	1400 - 1680
Chives	6.0 - 6.5	M	18 - 22	1260 - 1540
Fennel	6.4 - 6.8	L	10 - 14	700 - 980
Lavender	6.4 - 6.8	L	10 - 14	700 - 980
Lemon Balm	5.5 - 6.5	L	10 - 16	700 - 1120
Marjoram	6.0	M	16 - 20	1120 - 1400
Mint	5.5 - 6.0	H	20 - 24	1400 - 1680
Mustard Cress	6.0 - 6.5	M	12 - 24	840 - 1680
Parsley	5.5 - 6.0	L	8 - 18	560 - 1260
Rosemary	5.5 - 6.0	L	10 - 16	700 - 1120
Sage	5.5 - 6.5	L	10 - 16	700 - 1120
Thyme	5.5 - 7.0	L	8 - 16	560 - 1120
Watercress	6.5 - 6.8	L	4 - 18	280 - 1260

Flower Crops

Product	pH	Category	cF	ppm
African Violet	6.0 - 7.0	L	12 - 15	840 - 1050
Anthuurium	5.0 - 6.0	M	16 - 20	1120 - 1400
Antirrhinim	6.5	M	16 - 20	1120 - 1400
Aphelandra	5.0 - 6.0	M	18 - 24	1260 - 1680
Aster	6.0 - 6.5	M	18 - 24	1260 -1680
Begonia	6.5	L	14 - 18	980 - 1260
Bromeliad	5.0 - 7.5	L	8 - 12	560 - 840
Caladium	6.0 - 7.5	M	16 - 20	1120 - 1400
Canna	6.0	M	18 - 24	1260 - 1680
Carnation	6.0	H	20 - 35	1260 - 2450
Chrysanthemum	6.0 - 6.2	H	18 - 25	1400 - 1750
Cymbidium	5.5	L	6 - 10	420 - 560
Dahlia	6.0 - 7.0	M	15 - 20	1050 - 1400
Dieffenbachia	5.0 - 6.0	H	18 - 24	1400 - 1680
Dracaena	5.0 - 6.0	H	18 - 24	1400 - 1680
Fern	6.0	M	16 - 20	1120 - 1400
Ficus	5.5 - 6.0	M	16 - 24	1120 - 1680
Freesia	6.5	M	10 - 20	700 - 1400
Impatien	5.5 - 6.5	M	18 - 20	1260 - 1400
Gerbera	5.0 - 6.5	H	20 - 25	1400 - 1750
Gladiolus	5.5 - 6.5	H	20 - 24	1400 - 1680
Monstera	5.0 - 6.0	H	18 - 24	1400 - 1680
Palm	6.0 - 7.5	M	16 - 20	1120 - 1400
Rose	5.5 - 6.0	M	15 - 25	1050 - 1750
Stock	6.0 - 7.0	M	16 - 20	1120 - 1400

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