these are young blueberries bushes, I live in Adelaide south . Not sure how much water i need to give them . Plus we have had heat wave. I have had them undercover to protest.
Hello @blueberr
Welcome to the Bunnings Workshop community. It's sensational to have you join us, and thanks for sharing your question about your blueberry bush.
Thanks for sharing the photos of your blueberry plants. From what I can see, your young blueberry bushes are showing clear signs of heat and water stress rather than disease, which is reassuring. The curled, slightly darkened leaves and general drooping are the plant’s way of protecting itself when conditions are too hot and dry. Given the recent Adelaide heatwave, this is a very common response, especially for young plants growing in pots.
Water is the most important thing to get right at this moment. Blueberries have very fine, shallow roots and they dry out quickly, particularly in containers. During hot weather in southern Adelaide, potted blueberries usually need a deep watering every day, and during extreme heat they may need watering both morning and late afternoon. When you water, make sure you soak the pot thoroughly until water runs out the bottom, rather than giving small amounts. If the potting mix has dried out badly, water can run down the sides without soaking the roots, so sitting the pot in a bucket or tray of water for about 20 to 30 minutes once can help fully rehydrate it.
Keeping the plants undercover during the heatwave was a good decision, but it’s important they’re not sitting in trapped heat. A bright, shaded spot with good airflow is ideal while they recover, preferably with gentle morning light and protection from harsh afternoon sun. Once temperatures settle, you can slowly reintroduce more sun over time rather than all at once.
The potting mix also matters. Blueberries need a free-draining, acidic mix, usually one sold for azaleas or camellias. If the surface dries quickly, adding a light mulch such as pine bark fines or pine needles will help keep the roots cooler and reduce moisture loss, which makes a big difference in summer.
For now, avoid fertilising. Feeding stressed plants can burn the roots and slow recovery. Focus on steady moisture, shade, and keeping the root zone cool. You can trim off any leaves or tips that are completely crisped and dead, but avoid heavy pruning until the plants are clearly bouncing back.
Over the next week or so, watch how they look early in the morning. If the leaves are firmer and less curled then, you’re on the right track. Blueberries often wilt in the afternoon heat even when they’re coping. With consistent watering and protection, these plants should recover and push out new growth once conditions ease.
If you need further assistance, please let us know.
Eric
these are young blueberries bushes, I live in Adelaide south . Not sure how much water i need to give them . Plus we have had heat wave. I have had them undercover to protest. 
