Brassica Crop Nutrient Sufficiency Ranges
Plant Part	Time of Sampling	N	P	K	Ca	Mg	S	Fe	Mn	Zn	B	Cu
		Percent (%)						Parts per Million (ppm)
Broccoli
Most recently mature leaf	Heading	3-4.5	0.3-0.5	1.5-4	1.2-2.5	0.23-0.4	-	40-300	25-150	45-95	30-50	5-10
Brussels sprouts
Most recently mature leaf	At early sprouts	2.2-5	0.2-0.6	2.4-3.5	0.4-2	0.2-0.4	0.2-0.8	50-150	20-200	20-80	30-70	5-10
Cabbage
Most recently mature leaf	5 weeks after transplanting	3.2-6	0.3-0.6	2.8-5	1.1-2	0.25-0.6	0.3	30-60	20-40	30-50	20-40	3-7
	8 weeks after transplanting	3-6	0.3-0.6	2-4	1.5-2	0.25-0.6	0.3	30-60	20-40	30-50	20-40	3-7
Wrapper leaf	Heads half grown	3-4	0.3-0.5	2.3-4	1.5-2	0.25-0.45	0.3	20-40	20-40	20-30	30-50	4-8
	At harvest	1.8-3	0.26-0.4	1.5-3	1.5-2	0.25-0.45	0.3	20-40	20-40	20-30	30-50	4-8
Cauliflower
Most recently mature leaf	Buttoning	3-5	0.4-0.7	2-4	0.8-2	0.25-0.6	0.6-1	30-60	30-80	30-50	30-50	5-10
	Heading	2.2-4	0.3-0.7	1.5-3	1-2	0.25-0.6	-	30-60	50-80	30-50	30-50	5-10
Chinese cabbage (heading)
Oldest undamaged leaf	8-leaf stage	4.5-5	0.5-0.6	7.5-8.5	4.5-5	0.35-0.45	-	-	14-20	30-50	15-25	5-10
	At maturity	3.5-4	0.3-0.6	3-6.5	3.7-6	0.4-0.5	-	-	13-19	20-40	30-50	4-6
Adapted from Maynard, D.N., and G.J. Hochmuth. 2007. Knott’s Handbookfor Vegetable Growers. 5th edition. John Wiley & Sons,Inc. New York.