Questions

Could you tell me what this plant is?

I recently started a gardening job in a CE scheme, as I have a keen interest in gardening, just before christmas a colleague came across a seed in a bowl of potpourri that had been there for some time, however he planted it and it has stared to grow, I never seen the seed but he said it was quite large, (like an almond) I found out that the dried fuit it came from was a rambutan but the past few weeks it has started to grow bigger and it is starting to look more like a hosta. Can you help with this?

I have a Cornus florida Rubra for 7 years and it has never flowered.It is sheltered, facing south and looks healthy, fed twice a year. Soil is neutral and I have Cornus Controversa Variegata growing successfully near by. Can you please help as I cannot wait to see these flowers.

Just bought 5 Prunus Triloba trees in Dunnes Stores of all places for €9.99 each, couldn't leave them behind at that price. Anyhow, we plan on putting them along the front boundary of our house over the next week or so along with sowing our lawn. What size can we expect them to grow to and what distance should we keep between them ? Any other tips for planting them ? Pop them in Miracle Grow or Rooting Powder before placing in the ground or anything like that ?

Where would I buy a Yucca tree? Cant find one anywhere.

I have a ceanothus that I planted about 7 -8 years ago. Last summer was the last year it had any foliage. It is now dead with moss/lichens growing on it. I don't think it was the hard winter as i don't remember it being healthy last september october.