Seed storage and pretreatment for Larix kaempferi

Common name Larch (Japanese)
Scientific name Larix kaempferi
Storage characteristics Orthodox
Storage moisture content and temperature 6-8% @ < 4°C
Dormancy characteristics Shallow
Pretreatment method 6 (3-9) weeks cold (c. 4°C)
See pretreatment of shallowly dormant species
Efficacy of pretreatment / remarks Generally effective, a significant proportion of live seeds should germinate
Approximate date to initiate artificial pre-treatment (for 1 March sowing) 18 January


Storage characteristics

Orthodox - seeds that can be dried without harm, and once dried can be frozen, stored for years with little deterioration and relatively easily revived.

Pre-treatment method

Figures in brackets indicate that different seedlots often require different pretreatment durations. There are three potential courses of action:

  • Adhere to the pretreatment duration in bold, with the knowledge that the maximum potential germination of the seedlot may be sacrificed for the sake of simplicity.
  • Inspect the pretreating seed regularly. Sow when c. 10% of seed is chitted, with the hope that this is indicative that the remaining seeds are now close to germination.
  • Inspect the pretreating seed regularly. At suitable intervals, remove chitted seeds (by hand, flotation, and/or sieving). Sow chitted seeds and return balance to pretreatment until no more seeds germinate.

Practice Guide

CoverRaising Trees and Shrubs from Seed (PDF-648K)

Forestry Commission Practice Guide 18.