Iam doing hydroponics in tomato under net house .flowering in tomato plants is poor and wants to increase flowering,suggest some spray
If are doing hydroponics you might want to check your nutrient composition. The composition is different for vegetative, flowering and fruiting. There are several nutrient formulations available on the net. Search for Howard Resh.
Hydroponic systems will not compensate for poor growing conditions such as improper temperature, inadequate light, or pest problems.
Hydroponically grown plants have the same general requirements for good growth as field-grown plants.
The major difference is the method by which the plants are supported and the inorganic elements necessary for growth and development are supplied.
Temperature. Plants grow well only within a limited temperature range.
Temperatures that are too high or too low will result in abnormal development and reduced production.
Light. All vegetable plants and many flowers require large amounts of sunlight.
Hydroponically grown vegetables like those grown in a garden, need at least 8 to 10 hours of direct sunlight each day to produce wells
Adequate spacing between plants will ensure that each plant receives sufficient light in the greenhouse.
Tomato plants pruned to a single stem should be allowed 4 square feet per plant.
Water. Providing the plants with an adequate amount of water is not difficult in the water culture system, but it can be a problem with the aggregate culture method.
During the hot summer months a large tomato plant may use one-half gallon of water per day.
If the aggregate is not kept sufficiently moist, the plant roots will dry out and some will die.
Water quality can be a problem in hydroponic systems. Water with excessive alkalinity or salt content can result in a nutrient imbalance and poor plant growth. Softened water may contain harmful amounts of sodium.
Water that tests high in total salts should not be used.
Oxygen. Plants require oxygen for respiration to carry out their functions of water and nutrient uptake.
In soil adequate oxygen is usually available, but plant roots growing in water will quickly exhaust the supply of dissolved oxygen and can be damaged or killed unless additional air is provided.
A common method of supplying oxygen is to bubble air through the solution.
Mineral Nutrients. Green plants must absorb certain minerals through their roots to survive.
In the garden these minerals are supplied by the soil and by the addition of fertilizers such as manure, compost, and fertilizer salts.
The essential elements needed in large quantities are nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur.
Micronutrients - iron, manganese, boron, zinc, copper, molybdenum, and chlorine are also needed but in very small amounts.