What are these trees that grew on their own?

[Suhan]

Can you help identify these trees? Are they weeds? I’ve been getting lots of pests on my other plants so wanting to know if these trees are the cause.

 

[Suhan]

 

[cpp gardener]

Can you post some close-up pictures of individual leaves, twigs, flowers and fruits (if there are any) and the main trunk? I have some ideas, but I need more info and controlling each can be very different.
As far as ‘weeds’ go, if you didn’t plant it and don’t like it, it’s a weed.

 

[Anniekay]

No matter what type tree it is, it needs to be removed since it is too close to your house and as it gets bigger it will ruin the foundation and side of the building. I would cut it down and then use stump remover to kill the roots so it doesn't grow back.

 

[Oliver Buckle]

Annie is right, much too close to the house.
The leaves make me think eucalyptus, but I am not all that well acquainted with Australian flora. If you pick a leaf and break and crush it can you smell eucalyptus?
Unlikely to be the cause of pests, unless either the shade or the direct competition is weakening the other plants, pests know when something is stressed and go for it.

 

[cpp gardener]

Kind of looks like Brush Cherry, Syzygium paniculatum. A bit close, but manageable for 15-20 years.
Also looks kind of like a Ficus benjamina , which is a whole different ballgame!

 

[Oliver Buckle]

I mis-read that as British Cherry, cpp . knew it wasn't that, so read it again properly and checked, yes could well be. You often need a flower to be certain of these things.

"A bit close, but manageable" sounds sort of okay, but it is not particularly brilliant and not something that was chosen. Walls are such a great place for so many things, why not replace it with something you choose, such as a honeysuckle, clematis, sweet pea, or cotoneaster to name a few, and those are things that grow in boring old England, you could probably have a much better choice in Sydney.

 

[cpp gardener]

Maybe more shrubby than vine-y, like Grevillea, Banksia, Leucadendron, Diosma, Boronia (for the scent alone!). So many Aussie natives!

 

[nemodot]

Ligustrum (privet)

 

[MiTmite9]

Kind of looks like Brush Cherry, Syzygium paniculatum. A bit close, but manageable for 15-20 years.
Also looks kind of like a Ficus benjamina , which is a whole different ballgame!

Def not Brush-cherry.