I've just taken a look at your journal Claire and your garden/yard is a lovely size with plenty of scope for design and planting ideas. I like the curved footpath round the bed.
My gardens are separated, one at the back of my house which is approximately 60 x 35ft and one at the front which is approximately 60 x 60ft. Unusually I'm not allowed to create borders on one side of both gardens within 9 feet of the boundaries, as there are mains supplies running through, household gas and sewer. Another boundary is to close to my house and another has a bank so it really means the edges of my gardens are unusable.
The plants in the greenhouse are mostly all annual flowers with the exception of nine young tomato plants that will take over the greenhouse when the others move out. I don't grow vegetables apart from the tomatoes as unreliable weather conditions combined with a hungry sandy soil make it to difficult.
Picture 1......Against the glass, two trays of dwarf Lavatera. In front of those, mixed yellow plants and to the right in individual pots two different Salvias which are perennial. To the right of those there is a large blue pot waiting for warmer weather to go outside, that contains Calla Lilies.
Picture 2......Towards the lawn end of the shelf, tomatoes, then more mixed yellow plants and to their left some yellow and orange double flowered Cosmos seedlings. Also a lone trailing Begonia, it's pals are yet to join it from indoors.
Picture 3......At the far end double flowered Antirrhinums (Snapdragons), then mixed colour Nicotiana and finally Pheasant's Eye (Adonis Aestivalis).
All these plants will go into two flower beds and I'll take photo's later in the year when hopefully they'll be putting on a good display.
I tried a green house one time, it was actually really nice. But I just can't get plants to grow from seeds. They get leggy and then die. They never look as healthy as yours. Maybe one day, I'll get the chance to have another greenhouse and give it a try again.
The reason seedlings grow leggy is lack of light early in the year or to much heat. It's best to start them later when daylight hours are longer. Seeds that take a long time to germinate I start off in mid February and the others including tomatoes in mid to late March. They are all reared indoors until it is warm enough to move them to the greenhouse in the second or third week of April, even them some may need covering at night because of low temperatures as I don't heat my greenhouse.
Give it another go Galmal, things may turn out better this time.