Sunburn or something else?

[Mmacadamia]

I suspect these are all sun damage because were entering summer here in Australia and it’s hot and intense! But I just want to get a second opinion because I have also been quite liberal with the watering lately...

the first is a jade plant - living outside in full sun. All the outer leaves are turning pale and damaged. Too much sun or too much water?

the second are the leaves off my loquat tree. Also in full sun. I recently repotted it maybe into too large a pot. When I check the soil moisture it’s dry in the middle (the original pot/plant) and moist around the edge in the new soil. Hoping I haven’t caused any root rot.

The third is a yucca. It was doing really well in the full sun but one of the two plants - the leaves have started to curl and turn yellow/brown from the centre. I sporadically water them but maybe have been going overboard lately.

 

[Chuck]

Too much water..............on all of the plants.

Brown Spots on a Jade Plant

Jade plants (Crassula ovata) are beautiful and exotic, displaying thick, fleshy jade-green leaves. Whether placed in the house, the greenhouse or the patio, jade plant becomes the center of attention. Relatively easy to care for, its green, waxy leaves sometimes become marred with brown spots...

www.gardenguides.com

 

[Mmacadamia]

Too much water..............on all of the plants.

Brown Spots on a Jade Plant

Jade plants (Crassula ovata) are beautiful and exotic, displaying thick, fleshy jade-green leaves. Whether placed in the house, the greenhouse or the patio, jade plant becomes the center of attention. Relatively easy to care for, its green, waxy leaves sometimes become marred with brown spots...

www.gardenguides.com

for real? the soil in the jade and the yucca are bone dry from top to bottom though?

 

[Chuck]

for real? the soil in the jade and the yucca are bone dry from top to bottom though?

How do you know that they are dry? Have you actually checked the soil around the roots? Neither plant needs hardly any water at all.

 

[Mmacadamia]

As far as I can dig my finger in is powder dry and a moisture meter (which I know are wildly inaccurate but can be indicative of the presence of moisture) doesn’t even quiver all the way to the base of the plant.
I’m not disputing because I certainly have overwatered some of my other plants so It’s definitely a possibility and I’m going to treat them mean and ignore them for a while to see if they perk up.

 

[Sheal]

If you are watering regularly it may be that any nutrients in the soil have been washed through, try feeding them to see if that has any effect. Seeing you are in Australia perhaps standing them in shade during hotter, sunny weather would help too.

 

[cpp gardener]

Actually they all need more water rather than less. Full sun in Australia this time of year is INTENSE (think full sun in July with a heater on, unless you are in the most southern part of Victoria or Tasmania) and you can hardly over-water anything -even Jade plant-as long as there is a drain hole. A little fertilizer would help with the yellowing and a little shade for the loquat might help with the tip burn.