June is a critical month for crop development. Many cereals have moved through their main growth stages, maize is starting to grow rapidly, whilst OSR and root vegetables continue to build yield potential. At this point in the season, growers often focus on disease control and crop protection. However, nutrition still deserves close attention.
The challenge is that not every deficiency clearly announces itself. Some issues develop quietly within the crop, limiting performance long before visible symptoms appear. By the time obvious signs emerge, yield potential may already be reduced.
Identifying and correcting nutrient shortages early can make a significant difference. It helps crops maintain momentum during key growth periods and supports stronger harvest results.
Not All Deficiencies Are Easy to Spot
Many growers know the classic grain deficiency symptoms. Yellowing leaves, poor vigour, uneven growth and chlorosis often point towards nutrient shortages. Unfortunately, some deficiencies remain hidden for much longer.
Copper deficiency offers a good example. Crops can suffer reduced growth and lower performance before visible symptoms become obvious. Magnesium is a critical component for converting the cereal crops energy into protein and grain fill and benefits from being a very mobile nutrient. We have also seen an increase in the use of foliar K over the last few seasons, particularly with the warmer drier summers meaning nutrient uptake via the roots has been harder for the plants to access.
When crops enter periods of rapid growth, demand for nutrients increases sharply. If supply cannot keep pace, the crop starts to compromise important processes such as photosynthesis, nutrient transport and grain development.
This is why regular monitoring remains important throughout the season. A healthy-looking crop does not always tell the full story.
Why Timing Matters
There comes a point when yield becomes increasingly difficult to influence. Once key growth stages have passed, correcting deficiencies may improve crop appearance but deliver limited yield benefit.
June provides a final opportunity to address nutritional issues before that window closes.
Targeted crop deficiency treatments allow growers to respond quickly when deficiencies appear or where risks are already known. Foliar nutrition works particularly well because nutrients enter the plant directly through the leaf, bypassing any soil limitations that may restrict uptake.
This approach becomes especially valuable after prolonged wet weather, dry conditions or periods of rapid crop growth.
Supporting Cereals with Balanced Nutrition
Cereal crops require a wide range of agricultural nutrients to maintain growth and productivity. Focusing on a single nutrient often leaves other limitations unaddressed.
Fielder’s Cereal Mix B provides a balanced package of macro and micronutrients designed specifically for cereals. The formulation delivers nitrogen, magnesium, sulphur, boron, copper, manganese and zinc in an easy-to-use liquid feed.
The product absorbs quickly into the plant, helping crops respond rapidly during important growth stages. It also supports crop vigour and helps address nutrient shortages before they develop into larger problems.
For growers looking to protect yield potential, balanced nutrition often proves just as important as correcting individual deficiencies.
Tackling Magnesium Deficiency Before It Reduces Performance
Magnesium at this time of the season is becoming ever more prevalent in UK arable farming. Unfortunately, crops often suffer performance losses before symptoms become severe.
M’n M is our signature product that brings together a Magnesium and Manganese blend in the nitrate format. It is ideal for use at the T2 and T3 timing, ensuring the flag leaf and ear remain green and active, directly extending the crucial grain-filling window. The magnesium acts as the engine that pumps captured sugars out of the leaves and into the developing grain, boosting thousand-grain weight (TGW) and overall yield. Simultaneously, the Manganese maximises photosynthetic efficiency, ensuring a clean canopy during the final yield-building phase.
Looking Beyond Cereals
Hidden deficiencies are not limited to cereal crops. Root crops and maize frequently require additional support to maintain strong growth and development.
When looking at maize, our Fielder Phos-Lift provides a concentrated, highly soluble P205 formulation, helping deliver immediate energy directly to the young roots, ensuring rapid crop establishment and preventing early-season purple stunting. This powerful phosphorus kick is perfectly balanced with zinc, magnesium, and manganese to drive rapid chlorophyll production and nodal root development right as the plant transitions away from its seed reserves. We find a larger, zinc-stimulated nodal root system means the crop can find water later in the summer and zinc is the perfect partner with P, ensuring rapid leaf elongation and internode stretching. .
Don’t Let Deficiencies Decide Your Yield
As harvest moves closer, opportunities to influence crop performance become more limited. Hidden deficiencies can quietly reduce yield potential long before obvious symptoms appear.
Monitoring crops closely, understanding likely risk areas and applying the right foliar micronutrient for crops at the right time can help protect performance when it matters most.
If you are unsure what your crop may be missing, speaking with an experienced crop nutritionist like Fielder can help identify potential issues before yield becomes locked in. The right nutritional decisions today could make a noticeable difference when the combine starts rolling later this summer.
Any questions? Talk to us today.