Probably the most used propagation specific nutrient on the market, Formulex is a forgiving and simple to use one part nutrient for use with very young hydroponic plants.
Also works well as a balanced feed for early stages of growth in hydroponic systems, or as a full cycle feed for herbs and leafy greens in both hydro and soil.
From the manufacturer:
Formulex has a universal profile and was designed to grow all types of vegetative and floral crops to the highest standard. Professionals rely on Formulex for feeding seedlings, transplants and clones. Formulex remains popular with all types of growers, as it is cost-effective and straightforward use. The main benefits include: