Lettuce requires cool temperatures of 15-20oC. The iceberg varieties will not form heads in hotter conditions. It is a rapid growing crop with a life-cycle of 45-70 days from seeding/planting to harvest. Lettuce is a shallow-rooted crop, and a fine seedbed is needed to allow the roots to establish and grow. Lettuce grows best on light, well-drained fertile soils, with a pH of 6.0-7.0. Field lettuce needs to be sown on raised beds to aid water infiltration and retention, and allow adequate soil aeration and drainage. Lettuce is highly sensitive to salinity. Soils with an electrical conductivity of 2 or less are highly desirable. As shown in the following table, lettuce is a heavy potassium feeder, it requires triple the amount of K than N. Some types of lettuce do very well when grown in hydroponics systems.
Agroleaf Power Calcium
11-5-19+9CaO+2.5MgO+TE
Agroleaf Power Calcium prevents and corrects situations of calcium deficiencies. Instances like these are: excess evaporation and calcium sensitive crops such as lettuce, cabbage and fruits.
Agroleaf Power Magnesium
10-5-10+16MgO+32SO3+TE
Agroleaf Power Magnesium contains NPK, MgO and SO3. It cures and prevents magnesium deficiencies found in soils like: acidic, light and sand. It also increases photosynthesis and chlorophyll creation. It is great to use for crop recovery, stress relief and cell stretching.
Agroleaf Liquid Calcium+
8-0-0+13.8CaO
An innovative liquid fertilizer fortified with three technologies to boost absorption to help avoid Ca deficiences in fruit and vegetable crops.
Rise P Rise P
An innovative plant growth promoting rhizobacteria (PGPR) plus yeast fractions particularly focused on increasing phosphorus and metallic ions availability to plants.
Agromaster 19-5-20+4MgO | 2-3M
19-5-20+4MgO+19.5SO3
Agromaster High N / High K delivers enough controlled release nitrogen (34%) to ensure continuous feeding for 2 – 3 months. The high potassium levels encourage an increase in the size of fruits and vegetables. The magnesium content increases photosynthesis and plant energy.
Agromaster 12-5-19+4MgO | 2-3M
12-5-19+4MgO+17SO3
Agromaster High K delivers enough controlled release nitrogen (32%) to ensure continuous feeding for 2 – 3 months. The extra potassium levels increase the size and number of fruits and vegetables that crops produce. The added magnesium content increases photosynthesis and plant energy.
Agrocote Agrocote Max 1-2M
44-0-0
E-Max Release Technology™ is a reacted polymer coating for use on macronutrients and micronutrients to improve nutrient efficiency and plant utilization. The release of nutrition is based upon moisture and temperature, offering predictable longevities, even under the warmest conditions.