In pursuance of the objectives of a training programmed in GDR, the senior author was assigned the task of investigating the dormancy in Acacia longifolia seed and subsequent growth of the seedlings under glass house conditions. The study was carried out at department of Biology, Dresden Technical University, and Dresden from March to June, 1979. The good seeds (out of the lot imported from Holland) were subjected to seven pre-sowing treatments including hot and cold water, GA3 and P5. The pre-treated seeds were germinated on filter papers in the Jacobsen apparatus. From these, 60 seedlings per treatment (15 for each of the 4 replications) were randomly picked and transplanted stayed till the end of the experiment. The results of the study indicated that hot water treatment not only markedly increased the germination percentage but it also led to shortening the germination period of the species seed. This treatment excelled all others tested on this score.GA3 at a concentration of 200 ppm significantly enhanced the length of transplant roots, while P5 had no significant influence on all the characters observed. Similarly, CO2-gas exchange level of transplants was found to be of the same magnitude in different treatments.