Studies were carried out in the years 1998–2000 on the influence of the sowing date and standard on the yields and inflorescence quality of the annual (Lonas annua (L.) Vines et Druce). Seeds were sown in rows 25  cm apart directly into the ground over three different periods, on the following dates: 1^st. period – May 4th, April 29th and 28th; 2^nd. period – May 14th, 10^th and 8th; 3^rd. period – May 24th, 20th and 19th (sowing dates are given according to the sequence of consecutive study years). The seedlings were not thinned out. On each of the sowing dates planned, the following sowing standards were applied: 40, 60, 80, 100 and 120  g 100  m^-2. After reaching harvest maturity (80% of the inflorescence on the plantation in full bloom, with inflorescence shoots of a red-brown colour), the plants were removed from the field. Of the sowing dates studied, the plants with the most abundant flowering (10.62 pieces) with the highest number of capitula in the inflorescence (18.49 pieces) were obtained from the earliest sowing date. The lowest sowing standard of 40  g 100m^-2 influenced the inflorescence quantity most favourably. Plants from this combination showed a tendency towards the most abundant flowering.

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