Three experiments were conducted in the plastic greenhouse at the Sinna Garden, University of Ghana, Legon, Ghana to investigate the effects of different pre-sowing treatment (water treatment, growth regulator, and sulphuric acid scarification plus water soaking) on seed germination and plant growth of Caesalpinia pulcherrima from October to December, 2011 and January to April, 2012 respectively. The experimental design used was randomized complete block design. There were 4 treatments in experiment 1, 7 in experiment 2 and 6 in experiment 3. Each experiment was replicated five times. The result showed that pre-sowing treatments significantly influenced the germination mean time of seeds at
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