# The Cereal Seeds Regulations 1993, Paragraph 6: Standards for varietal purity, species purity and wild oats


Crops to produce
Level
Varietal purity (excluding rye and maize) percentage by number
Species purity (excluding rye and maize) percentage by number
Wild oats maximum number per hectare
oats
barley
wheat durum and spelt wheat
rye and maize
triticale
* Wild oats — Avena fatua, Avena sterilis, Avena luoviciana.
! For rye the number of plants of the same crop species which are recognisable as obviously not being true to the variety shall not exceed one per 30 sq m for the production of Basic Seed and one per 10 sq m for the production of Certified Seed.
+ Crops to produce seeds at the Higher Voluntary Standard must not be more than one—third laid at the time of inspection.
# For maize, the crop shall comply with the standards set out in paragraph 8(d) below.
Basic Seed Minimum
Higher Voluntary Standard
99.95
99.99
Nil
7
7
—
—
standard
99.9
No standard
Nil
7
7
7
7
Certified Seed
—
—
—
—
—
—
50
—
Certified Seed of the First Generation
Higher Voluntary Standard
99.9
99.99
Nil
7
7
—
—
Minimum Standard
99.7
No standard
Nil
20
50
—
50
Certified Seed of the Second Generation
Higher Voluntary Standard
99.7
99.99
Nil
7
7
—
—
Minimum Standard
99.0
No standard
Nil
20
50
—
—

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Source: https://www.legislation.gov.uk/uksi/1993/2005/schedule/4/paragraph/6 (the official version)
Page: https://openlegislation.uk/cereal-seeds-regulations-1993/schedule-4/paragraph-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.