Have seeds of Delonix Regia makes a beautiful bonsai. will like to trade for other seeds. Just make an offer.

Are you using bottom heat after planting the seed? Many tropical plants will not germinate at room temperatures of 70-75 degrees, but require some heat (90 degrees plus). Scarifying the seed with a nail clipper is a technique I have used with seeds with such a hard outer coating, and it does work. I personal would not put them into boiling water (warm water soak before planting...overnight...is different). Also, one week is not sufficiently long to determine whether your seeds are still viable. If the seed process does not work for you, Delonix is also readily available from bare-rooted starter plants, and they are very quick growing! You might also try posting your question on the tropical plants forum. Good luck!

Yes to your first question. These trees are semi- to fully deciduous even in more tropical climates (during the dry season--our winter). They have been introduced into South Florida where they seem to grow beautifully. If you following the instructions on the fertilizer you're using, you shouldn't be afraid of harming the tree. Not sure of the specific nutritional needs of this plant, but given its rapid rate of growth, I'm sure it would appreciate an occasional fertilizing. If you can, put the plants outside for the summer. Also, your pots look to be large enough but they seem half full. If you add more soil make sure you add it to the bottom (don't pile it on the top or the trunks will rot). Hope this was helpful.

I fell in love with this tree in Key West. Though some of the dwarf Poinciana's will return in spring and bloom. (As Pride of Barbados) I'm of the impression the Royal only grows as far north as central florida. You might want to check in the florida group. Where they're more familiar with this plant. A large Royal Poinciana in bloom is a sight to see.