Branches dying back could be caused by disease. In this case, cut out all infected stems, although it could be too late.
Pruning cuts made in the wrong place can cause dieback. Clean cuts should be made only just above a bud, as a longer section of stem above the last bud has a tendency to rot.
Was the initial planting, or mulching, too deep? Mulch is good, of course, but it shouldn’t bury the stem above the graft.
I had a lovely old Hoya - like porcelain - which had loads of blooms, living happily in the greenhouse. Then last year a prolonged cold spell turned it to mush. Such is life.
Sorry if I’m stating the obvious re decking with things like sheds placed on them - what I have noticed this year as I look at fencing and decking, is that the point of contact with the earth is where most of the problems stem from. Wood in the ground basically seems to rot and affects supports for the above ground elements. Not sure how you get around this, whether there are hardwood posts for critical areas or galvanised steel posts perhaps.
Peter
There is a company selling sleeves for posts that protect the area where a post will have exposure to air and water to rot. They claim it works though they did seem pricey.
Do you have a current photo of the leaves?
The old trick was to soak the post in creosote or even old engine oil to prolong their life against moisture. Whether that is now environmentally acceptable I don’t know.
Predictive text was my assumption!
The photo is too poor to see properly. The colour of the leaves don’t indicate it to be struggling too much. It does look like it lacks vigour.
Roses are not that easy, even though they’re common as muck. They need a lot of feed constantly throughout the growing season. Liquid high potash fertiliser that gets straight to the roots fast. They also don’t like drought. The raised bed you’ve created can dry out remarkably quick and it does sound alarm bells when you say you’ve only water in dry spells.
When do you pick your tomatoes? When ripe, ripening or yellow?
Mine are grown in pots rather than a greenhouse a mixture of moneymaker, smaller tomatoes and cherry tomatoes.
The cherries have been cropping well for a few weeks and some of the moneymakers are ripening.
It’s humid today, we’ve largely (unfortunately I’d say) missed the thunderstorms as it’s too humid.
We’ve hit September and I fear blight is just around the corner. I’m tempted to harvest some which are starting to yellow. Blight was never a major problem until maybe 10-15 years ago. Something’s changed or maybe I’m planting too late.
The pot grown aubergines continue to impress as there must be a dozen or more growing, picked 2 supermarket sized ones today.
Runner beans ok but not cropping as quickly this year. Was it my imagination or did those pesky sparrows start eating the flowers a few weeks ago?
Patio peppers and small chilli peppers have some fruit - boy the chilli ones are great. Unsure with the patio peppers which ought to go red if I should pick when green and allow them to turn or if I need to wait? Thought some insects were causing tiny holes in most of the leaves - nope, very tiny snails, why don’t they finish off a single leaf then move on?!!
Picked some ‘sweet million’ cherry like tomatoes earlier - never had them before but incredibly tasty.
Really surprising how some of the other cherry ones I’ve planted this year are rather devoid of taste.
Nice idea roses on a grave.
Actually, there is a cat (Smokie) buried under the other raised bed 
My preferred cherry tomato but this year, for the first time, they’ve been slow and undersized. Probably the seed or my care as they have been no problem in the past.
I liked them for their balance of taste and sweetness.
I would dispose of a dead rat in a bag (ideally double-bagged) and in a dustbin, clearly poisoned and perhaps best kept out of food chain
My bulbs are starting to arrive , I am keen to plant botanical tulips this year .
Whilst tulips are not ideal for pollinators these are the forerunners of the hybridised tulips and will have to attract pollinators in the wild (stock photo)
I see you’ve been bitten by the Farmer Gracy bug too.
