Posted: 17/05/2012 at 19:45
Tina, I take it you have time to wait for those particular plants from seed the Laurus seed is sown in Autumn and would get a cold start.
Olive or Olea are also sown in Autumn, with both of those it is better to obtain ripe cuttings. The best bet is to buy ready grown plants in pots which will be a few years old in the case of the Olive which are frost hardy. Do not expect fruit for many years and you need two.
Strelitzia you sow the seed in spring, they need to be warm but shade in bright sunlight, they also send up suckers which can be propagated.
I am an old time gardener so no point in me starting any of those plants off they take too long to do anything and the Olea will take years, they are not showy plants and a hard enough frost can take them out, they do like deep well drained soil.
Best of luck,