Extension core

Washington State University Fertilizer Guides & Summary

Crop and Publication#	High N	Low N	High P	Low P	High K	Low K	Sulfur Test	High S	Low S
Alfalfa PNW 611	40	30	295	68	240	96	If low	40	40
Alfalfa - Irrigated FG-3	40	30	295	68	240	96	If low	40	40
Alfalfa - Grass Seedings FG-0016	40	20	150	45	150	40	If needed	30	30
Apples FG-0028A	80	30	0	0	120	120		30	30
Asparagus FG-45	150	150	150	75	200	100
Asparagus - Irrigated FG-12	80	35	300	55	240	96	If Low	60	60
Barley, Malt FG-29	50	5	60	40	80	60	Ann. crop	10	8
Barley, Spring FG-29	180	30	295	68	240	96		60	60
Barley, Winter FG-29	80	35	60	40	80	60	Ann. Crop	10	8
Barley - Irrigated FG-9	140	30	295	68	240	96	If Low	60	60
Barley, Winter FG-17	90	30	70	45	60	30	If Low	20	15
Beans, Field - Irrigated FG-0005	100	55	300	70	240	90	If low	40	40
Broccoli FG-47	200	200	90	35	180	60	Add	40	20
Brussel Sprouts FG-47	200	200	90	35	180	60	Add	40	20
Cabbage FG-47	200	200	90	35	180	60	Add	40	20
Carrots FG-51	100	60	160	60	180	60	If needed	40	20
Cauliflower FG-47	200	200	90	35	120	60	Add	40	20
Cherries FG-0028A	80	20	0	0		120		30	30
Corn, Field FG-6	280	20	295	68	240	96	If low	40	40
Corn, Sweet FG-39	120	75	125	50	160	40	Add	20	20
Corn, Sweet - Irrigated FG-35	280	40	295	68	240	96	If needed	40	40
Cucumbers FG-14	120	105	295	68	240	48
Cucumbers FG-43	120	120	150	90	100	40	If needed	30	30
Gardens FG-0050	44	44	174	43	174	44
Gardens, FG-52	44	44	196	87	87	87
Grass Seed FG-38	120	30	60	40	100	65	Add	20	10
Grass Seed - Irrigated FG-38	160	70	90	45	120	72	Add	20	10
Hops FG-11	140	30	204	68	240	96	If low		60
Lawns East FG-24	436	348	130	44	174	66	Add	44	22
Lawns, Playfields, Turf - West FG-0041	262	131	174	87	392	87
Lentils FG-25	30	20	60	40	80	60	Add	20	15
Melons FG-14	120	105	295	68	240	48
Mint FG-8	300	40	295	68	240	96	If low	60	60
Oats FG-9	180	30	295	68	240	96	If low	60	60
Ornamentals FG-49	87	87	130	44	130	44
Pasture - Dryland FG-37	150	60	60	40	80	35	Add	20	15
Pasture - Irrigated FG-0004	120	60	295	68	240	96	If low		40
Peaches FG-0028A	80	30	0	0	120	120	If low	30	30
Pears FG-0028A	80	10	0	0	120	120	If low	30	30
Peas, Dry Edible FG-25	30	20	60	40	80	60	Add	20	15
Peas, Green FG-33	40	20	295	68	240	96	If low add	60	60
Perennial Ryegrass FG-46	150	130	80	30	60	40	Add	20	10
Potato - Central WA EB1871	350	80	295	30	480	100	<2-10	250	40
Potatoes, Early FG-7	280	80	295	68	480	120	If needed	40	40
Potatoes, Late FG-7	320	120	295	68	480	120	If needed	40	40
Prunes FG-0028A	80	30	0	0	120	120	If low	30	30
Red Clover - Grass Seedings FG-20	90	90	125	45	120	40	If needed	30	30
Rhubarb FG-45	150	150	150	75	200	100
Squash FG-14	120	105	295	68	240	48		30	30
Squash FG-43	120	75	150	60	100	40
Strawberries FG-15	60	40	295	114	240	48
Sudangrass, Pasture - Irrigated FG-36	160	160	295	68	240	96	If needed	40	40
Vineyards - Irrigated FG-13	120	30	295	68	950	950	If low	40	40
Wheat EB1987	see guide	see guide	40	10	100	50	If < 8ppm	20	10
Wheat, Spring FG-48	90	20	140	90	60	30	Add	20	15
Wheat, Spring - Irrigated FG-9	180	30	295	68	240	96		60	60
Wheat, Winter FG-17	150	50	70	45	60	30	Add	20	15
Wheat, Winter - Non-Irrigated FG-34	324	80
Wheat, Winter - Irrigated EB1487	402	0	295	68	240	96	If top ft. is 3ppm or less and 2nd ft. is 8ppm or less	40	40
White Clover - Grass Pasture FG-1	90	75	125	45	120	40	If limiting	30	30

Notice: Some of these fertilizer guides have not been updated for some time. More current information may be available for commercial growers, particularly for common crops, and should be considered. Varieties, yield goals, local conditions and management practices vary and are continually changing and such changes and differences impact proper crop nutrition recommendations.

For more information please contact:

Phil J Petersen, Ph.D.

Area Extension Educator

WSU Extension Grant/Adams Area

Fertilizer Guides

Washington State University Fertilizer Guides & Summary