Pest infestation or plant diseases aren't always the reasons for plant disturbance.
Other than these two, also consider Plant Nutrient Deficiency when managing your plants in the garden.
So if you happen to detect an unusual sighting on your plants (such as a discolored or deformed plant, or a combination of other things), then there must be a problem.
Also take into consideration that plants can also get sick from too much nutrients in its system, so what more when it experiences a plant nutrient deficiency.
So before you go right ahead into fixing the problem, you should assess the symptoms first.
Here are a few tips when checking your plants for this concern:

• Only cross out plant nutrition deficiency if diseases or pests are present in your observation.
  
• Discoloration on your plant life is a symptom that there's a lack of plant nutrients in its system.
  
• Other than discoloration, also take note of deformation in the look of your plants.
  
• If you happen to notice a slow growth in your plants, you can immediately trace this to the soil.
  Your garden soil may either be poor when it comes to draining excess water or is not that loose (compact soil inhibits the growth of plant roots - roots help bring in the nutrients to the plant).
  
• Intense weather conditions also impact a plants slow development (this also goes for plants that bear fruits and flowers).
  

Plants, whether bearing fruit or flowers, will always need some nutrients in their physical make to be able to thrive well (to be at its healthiest state).
But the nutrients plants need to be able to develop well should be just in adequate amounts.
So to prevent such shortage or excess, read the symptoms below: 1.
The first type would be the Macronutrients: a.
Calcium (Ca) i.
Shortage - When it comes to plant nutrient deficiencies, look at the tips of new plant leaves as these start to rot; fruits also look poorly developed ii.
Excess - can lead to a plants scarcity of Mg and K b.
Magnesium (Mg) i.
Shortage - When it comes to mineral deficiencies in plants, a lack of Mg shows a staining on the older leaves which then progresses to the new ones; fruits also look poorly developed ii.
Excess - may contribute to a plants shrinkage should there be an unevenness with Ca and K c.
Nitrogen (N) i.
Shortage - leaves start to turn from light green to yellow; contributes to slow growth; fruits look poorly developed ii.
Excess - turns into a darker green shade which then causes to attract disease and pest infestation d.
Phosphorus (P) i.
Shortage - When it comes to the mineral deficiency in plants, the leaves may slowly show a violet stain; can also cause for plants to slowly grow ii.
Excess - can lead to the shortage of micronutrients e.
Potassium (K) i.
Shortage - A yellow discoloration on older leaves, which then leads to its death ii.
Excess - may cause a lack in Mg and Ca f.
Sulfur (S) i.
Shortage - A yellow discoloration on younger leaves, which then progresses to the whole plant ii.
Excess - Can cause younger leaves to fall 2.
The second type would be the Micronutrients: a.
Boron (B) i.
Shortage - shows discoloration in some parts of the leaves, as well as distortion; tips of plants also start to die ii.
Excess - Before the leaves fall off, it will first experience a yellowing on the tips of the leaves b.
Iron (Fe) i.
Shortage - Shows staining (yellow or white) on the veins of underdeveloped leaves ii.
Excess - Shows bronzing and tiny brown spots on the leaves c.
Zinc (Zn) i.
Shortage - Shows yellowing on the veins of underdeveloped leaves ii.
Excess - may cause a lack in Fe You can prevent plant nutrient deficiency from occurring by always checking for signs and symptoms, and resolving these right away.
With the right nutrient combination's, you can expect your foliage to develop at its fullest.