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Seed import requirements

Seeds must meet certain requirements to be allowed entry into WA.

Variety of seeds

Western Australia (WA) is free froa number of serious plant pests, diseases and weeds which are present elsewhere in Australia. If introduced into WA, many of these would be devastating to agricultural and horticultural industries 

For seeds to be allowed entry into WA, certain requirements must be met. First, they must be listed as permitted on the Western Australian Organism List (WAOL). 

Western Australian Organism List

Search for restricted seed types 

Important

Approved seed testing laboratories in Australia

Approved seed testing laboratories outside Australia 

ISTA certificates issued must be an Orange International Seed Lot Certificate. 

Find approved seed testing laboratories outside of Australia

Seed mixes 

Seed mixes that DO NOT contain restricted seeds require a Seed Analysis Certificate to accompany the consignment.  

Seed mixes containing restricted seeds are to be accompanied by a valid Plant Health Certificate. 

QWA utilises best practice following the Association of Official Seed Analysts method: 

  • The seed supplier must advise the sampler of the components of the mixture and the relative percentage of each type of seed in the mix. 
  • This information must be supplied to the seed testing laboratory together with the sample, which must be drawn by an accredited sampler.  
  • It is recommended that the sample provided to the laboratory is at least 1 kg to ensure a sufficient sample is drawn.  
  • The Bulk Search Weight (BSW) of the mixture is to be calculated by allocating a corresponding proportion of the scheduled BSW for each seed type to the total BSW for the sample.  
  • The seed testing laboratory shall annotate the component percentages as advised by the client on the Seed Analysis Certificate so QWA can verify the BSW was sufficient, together with a listing of non-component seeds found (if any). 

Table 1: Example – calculating the bulk search weight of a seed mixed consignment 

Components (as advised by client) 

% component (as advised by client) 

ISTA BSW 

Total BSW 

Phalaris canariensis 

24% 

200 g 

48 g 

Panicum miliaceum 

26% 

150 g 

39 g 

Carthamus tinctorius 

25% 

900 g 

225 g 

Helianthus annuus 

25% 

1,000 g 

250 g 

 

 

Total BSW 

562 g 

 

Table 2: Example – calculating the maximum lot size for a mixed seed consignment 

Components (as advised by client) 

% component (as advised by client) 

ISTA max lot size (kgs) 

Total BSW (% component x ISTA) 

Phalaris canariensis 

24% 

10,000 

2,400 kg 

Panicum miliaceum 

26% 

10,000 

2,600 kg 

Carthamus tinctorius 

25% 

25,000 

6,250 kg 

Helianthus annuus 

25% 

25,000 

6,250 kg 

 

 

Total BSW 

17,500 kg 

Additional requirements for seed with altered lot codes or other descriptions, such as coated or blended seeds  

A statutory declaration is to be made on the exporting company’s letterhead by the responsible officer of that company containing the following information: 

  • detail or original lot code and seed name/type 
  • detail of new lot code and seed name/type 
  • for blends – details of each component in the seed mix/blend including individual lot codes and species names with percentages 
  • for coated seed – details of the increase in lot weight (if any) 
  • name of person making declaration, their position and signature plus date of issue.  

Summary of restricted seed types

Quarantine inspection services

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