Table 4.11

Cultivation of Cannabis Plants
1. Have you ever grown cannabis plants?
	n	%
Yes	739	60.1
No	491	39.9
Base	1230	Response Rate (% of all respondents)	92.3
2. What sort(s) of seeds or stock did you last grow from?
Type(s) of seeds	Total (exclusive)	Total (inc. combinations)	% of growers
Hemp	80	109	16.2
Imported Bush	257	337	49.9
Pedigree Seeds	157	239	35.3
Cuttings	72	124	117.9
Base	670	Response Rate (% of growers)	90.7
3. What growing method(s)?
Method	Total (exclusive)	Total (inc. combinations)	% of growers
Outdoor	99	165	23.4
Greenhouse	66	98	13.9
Indoor	410	501	71.2
Hydroponics	25	54	7.7
Base	704	Response Rate (% of growers)	95.3
4. What type(s) of lighting?
Lighting	Total (exclusive)	Total (inc. combinations)	% of growers
Natural Light	474	514	76.6
Gro-lux	65	98	14.6
Metal Halide	21	62	92
HP Sodium	41	81	12.1
Total High Intensity		112	16.7
Base	671	Response Rate (% of growers)	90.8

Table 4.12

Number of plants grown on last occasion
Number of Plants	n	%
1-5	356	50.0
6-10	150	21.1
11-15	57	8.0
16-20	43	6.0
21-30	22	3.1
31-50	29	4.1
51-100	22	3.1
101-300	12	1.7
>301	4	0.6
Mean No. Plants	19.2
Base	695

 

Table 4.13

No. of plants grown by frequency of cannabis use
Frequency	n	Mean No. plants	St. Dev	Std Error
Experimental	13	9.0	13.0	3.6
Occasional	70	5.5	9.4	1.1
Regular	114	15.4	36.6	3.4
Daily	483	22.9	108.1	4.9
Other	15	7.1	12.2	3.1
Total	712	19.2	90.6	3.4

Table 4.14

Cannabis use Indices by number of plants grown
Monthly Cannabis Use (g)
No. of plants grown	Mean	Std Dev
Non Growers	19.9	50.7
10 plants or less	25.4	25.4
Over 10 plants	37.0	42.2
1 Factor ANOVA	p <	.0001
Monthly Cannabis Purchase (g)
No. of plants grown	Mean	Std Dev
Non Growers	28.6	110.7
10 plants or less	52.1	140.8
Over 10 plants	64.9	168.9
1 Factor ANOVA	p =	.0015
Monthly Cannabis Spending (£)
No. of plants grown	Mean	Std Dev
Non Growers	48.6	59.4
10 plants or less	74.9	92.3
Over 10 plants	87.6	115.9
1 Factor ANOVA	p <	.0001
No of Spliffs Smoked per day
No. of plants grown	Mean	Std Dev
Non Growers	4.6	4.3
10 plants or less	6.7	5.6
Over 10 plants	7.8	6.6
1 Factor ANOVA	p <	.0001
No of Spliffs Rolled per day
No. of plants grown	Mean	Std Dev
Non Growers	3.9	4.0
10 plants or less	5.7	5.4
Over 10 plants	6.8	5.7
1 Factor ANOVA	p <	.0001
No of Pipes/knives Smoked per day
No. of plants grown	Mean	Std Dev
Non Growers	1.6	3.0
10 plants or less	2.4	3.9
Over 10 plants	4.2	5.7
1 Factor ANOVA	p <	.0001

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