Many of the trees were raised from his private seed collection.

It also contains a seed collection of 2000 samples.

The cost for all three is £10.95, and a seed collection worth more than £7 is included with every order.

Additional efforts included public education, biological research, seed collection and transplant efforts.

Although unauthorised seed collection from roadside plants has occurred in the past, this practice is now less common.

In 1965, following increasing overcrowding a new building was constructed and research expanded into seed collection for plant conservation.

For plants, the germplasm may be stored as a seed collection or, for trees, in a nursery.

Participants projects including teaching in schools, basic construction, planting trees, seed collections and community work.

Eventually he began donating what he called "seed collections" of his works to hospitals and mental institutions.

The idea behind these seed collections was for the receiving organization to hold onto the collection while they grew in value.