magnesium deficiencyIf a plant lacks certain nutrients, it will look unhealthy- with pale of yellowing leaves, stunted growth or withering stems. In general, sick-looking plants are suffering from more than one nutrient deficiency. However, it can be difficult to identify which deficiencies a plant is suffering from, because there are so many different  types and symptoms can vary from plant to plant.

Take a look here to find out more: https://www.rhs.org.uk/prevention-protection/nutrient-deficiencies

As a quick and easy solution to reviving a plant that you suspect is lacking nutrients, giver it a liquid feed that contains a good mix of trace elements or a foliar feed for faster uptake. Always follow the manufacturer’s instructions. Some liquid feeds can also be used at half strength as a foliar feed.

Source: ‘Short Cuts to Great Gardens’- Readers’ Digest 1999

Old School Gardener