In the years 1998–2000, studies were undertaken to determine the optimal sowing date and sowing density for the field cultivation of (Lonas annua (L.) Vines et Druce). Seeds were sown in three different periods, on the following dates:1st period – 4th May, 29th and 28th April; 2nd period – 14th, 10th and 8th May; 3rd period – 24th, 20th and 19th May. Five sowing rates were applied on each of the sowing dates, i.e.: 40, 60, 80, 100 and 120 g·100 m^-2. The favourable influence of the early sowing dates on the plants quality was observed. Moreover, it was proved that plants grown on plots with the lowest sowing rates were characterised by the highest number of embranchments of the I order.

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