Feeding plants to get the best results is a fascinating subject. Below is a recommended feeding chart from GHE, one of the top makers of hydroponic nutrients.
You will see that there are two stages – the seedling and young plant, then the flower and fruiting stage.
During the seedling and young plant stage, nutrients are given at the same amounts – in other words, a balanced feed.
When the plant reaches flowering is when a boost of “Gro” is given, then later a boost of “Bloom” is given and the Grow is reduced.
Micro nutrients remain at around the same level throughout this flowering – fruiting period.
The lower part of the chart, the “Expert”, recommends additives to be given along with the main three feeds but these are not important for our purpose.
What we can do is feed a balanced feed (the Wilco feed) up to flowering, then add a tomato feed to boost the Bloom which is phosphorus and potassium.
Unfortunately, hydroponic nutrients are expensive but it is possible to provide our plants with a similar range of nutrients at each stage of their growth, using much less expensive options.