Sorry I can't ship that late, it will be hell on earth here by May.
Quality Contorted filberts are LAYERED, or self rooted, grafted plants are garbage. You are right, they are suckering shrubs and if grafted the suckers overtake the tops. Mine are layered. Corylus is very difficult to root by cuttings, it requires a specific agrobacteria to induce rooting, or tissue culture.
