Hi @Bandick,
Thank you for your question about yellow leaves on your Pittosporum Miss Muffett.
You might like to start by having a read through How to diagnose a sick plant for some information on diagnosing common issues with plants.
Pittosporum Miss Muffets can have a slight yellow tinge, but this does appear more than normal.
Yellowing leaves on your Pittosporum 'Miss Muffet' can be caused by various factors, and addressing these issues will help restore the plant’s health.
Watering is often a key factor; both overwatering and underwatering can lead to yellowing. Overwatering may cause root rot, depriving the roots of oxygen, while underwatering stresses the plant by limiting its access to moisture. To manage this, ensure your soil is well-draining and consider using products like Richgro 5kg Ezi Wet Granulated Soil Soaker, which helps water penetrate more effectively and improves soil drainage.
Nutrient deficiencies are another common cause. A lack of nitrogen typically results in older leaves turning yellow. Applying a balanced fertilizer such as Scotts Osmocote All Purpose Controlled Release Fertiliser can help address this issue.
If the plant is struggling with nutrient uptake due to soil pH, it’s worth testing the soil with a Manutec Garden Care Products Soil PH Test Kit. Pittosporum prefers slightly acidic to neutral soil (pH 6.0 to 7.0). If your soil is too acidic, a product like Richgro 2.5kg Natural Garden Lime can help balance the pH, whereas if it is too alkaline, adding compost or manure will help to balance.
Pests can also cause yellowing leaves by weakening the plant. Common pests include aphids, scale insects, and mites. To protect your Pittosporum, regularly inspect the plant and use an appropriate treatment if needed. Yates 750ml Ready To Use Nature's Way Citrus And Ornamental Spray is effective against common garden pests without harming the plant.
Allow me to tag @Noelle to see if she has any further advice to offer.
Let me know if you have any further questions.
Jacob
