‘Graffiti Fire’ plants produced flowers of the
greatest diameter when they were grown in the
substrates supplemented with SSRS or SSL compost
and peat in the proportion 1:7 (substrates 3
and 5). The highest number of flowers per inflorescense,
on average 10 more than in control, was
found in the plants growing in the substrate supplemented
with higher dose of SSRS compost.