%0 Research article
%T Field performance of hybrid aspen clones planted in summer
%A Luoranen, Jaana
%A Lappi, Juha
%A Zhang, Gang
%A Smolander, Heikki
%D 2006
%J Silva Fennica
%V 40
%N 2
%R doi:10.14214/sf.342
%U https://silvafennica.fi/article/342
%X We investigated the possibility to plant clonal hybrid aspen (Populus  tremula x tremuloides) during the summer of propagation when the plants  are 20–25 cm tall and only a few months old. In four experiments carried  out in years 1998–2001, survival of summer-planted hybrid aspens was at  least as high as that of hybrid aspen planted in autumn and spring. In  all experiments, compared to planting in September or the following May,  height growth was greater with planting in July and early August. Root  egress of hybrid aspens planted in July and August was also greater than  that of aspens planted in autumn or the following spring. Summer  planting was thus possible both with plants produced by micropropagation  and with those produced from root cuttings.