There is an extremely active House Plant Forum where they will be more than happy to answer all of your questions.

Janet, do they have any labels with names on them? Are they all the same type of plant? Pictures would help as well as where you live; zone 7 for instance in SE seaboard USA. Not all orchids need the same conditions. Try again for answers with additional info.

My plants in the raised bed are nearly 5 years old now, The one in pots are between 2 and 3. The ones in the pic in the square pots are chandler and brigitta(bred in Australia), in the round pot is a dwarf raspberry called ruby beauty in Europe and known as shortcake in the US. In the raised bed there I have Berkeley, bluecrop, spartan and Goldtraube all northern highbushes. I got plenty of berries the last 2 summers, I never weighted the pickings though. So far I never changed the potting mix in the beds , I mulch heavily every year or two, and I repot in to bigger pots once every year or when the root seem to have grown and filled the old pot. I'm not familiar with that fertiliser however seems like a good choice and a good combination of organic and inorganic, plus I see it contains sulfur,ammonia and fe sulphate so it will lower ph too. Over here it's not recommended to fertilise late summer or autumn , but I don't know what's the climate in Melbourne is like. I m sure is lovely in the summer that you can grow southern highbushes and rabbit-eyes. i don't know what seasol is. And finally, I m not an expert Alec. I started just like you, I have killed my fair share of plants due mostly to over love and too much TLC. In fact as I was repotting a toro bluberry last week, I noticed that the root was tiny but the bush had grown like a weed last summer with new bull shots everywhere, maybe I over fertilised it and I m not sure if the root system will catch up or the plant will succumb. Your sunshine blue looks very well, the legacy one on the other end not so good in comparison, if the root ball is not damaged it should be ok. You are definitely on the right track and are getting a nice collection of plants this April. Soon you'll be collecting a lot of berries mate, but don't rush it I hardly got anything the first 2/3 years.

Congratulations on the new baby. Since you recently planted the tree and the backfill soil is less dense than original soil, it has greater water-holding capacity. Later, after its settles some, it will become more normal and also, the tree's roots will be expanding into the surrounding native soil. Then, what happens here in this little hole will be less important. In the meanwhile, you could create a device that allows you to remove excess water without digging the tree out. Of course, you have to tend it manually until things settle out. Here's my stab at a device that would allow you to access the water at the bottom of the planting hole merely by removing a PVC cap. You could use whatever type of manual pump that is convenient to you. (Some can be operated by a battery powered drill/driver.) When the time comes that the access to water is no longer needed, the 4" PVC tube can be pulled out of the ground and the hole filled with soil. (Picture to come when system allows.)