alpinia purpurata and Hedychium gardnerianum outside
I went to the Lotus Festival in Echo Park (L.A.) last week and bought a couple of ginger plants and a heliconia. One of the gingers is alpinia purpurata (red ginger), and the other is Hedychium gardnerianum, kahili ginger (or so I was told). The heliconia is labelled Heliconia Stricta 'Dwarf Jamaican'. The plants are in fairly small pots, and I'm wondering if I should plant them directly into the ground or keep them in pots until next year. I have several other gingers and heliconias already in the ground that are doing well, but the gingers that I transplanted before were already fairly large plants, and the heliconia I grew from seed, straight into the ground.
How much light will these plants need? I have a feeling that the ginger might need full sun in order to bloom - perhaps somewhat less sun for the heliconia. I've seen Hedychium gardnerianum (kahili ginger) in yards in this neighborhood blooming in full sun, but mine seems to be more sensitive to light, as some of the leaves turned white after being in full sun. Do I need to introduce this to full sun gradually, or will it do better in partial shade? The other gingers I have won't bloom unless they are in full sun, although the heliconia is on the north side of the house and blooms well there.