source: [lemma=it] [□=□] □ □
destination: [lemma=it] [tag=□] □ □
spec: If a stock races up 20 % in one to four weeks out of a proper base , it probably means it has plenty of fuel left and you should hang on to it . A fine-grade potting medium is often used ; fir bark and perlite ( 3:1 ) is a common , well-draining mix .