generally weaving in the green also needs to be done post summer when the sap has retreated back down to the roots - in fully sapped state they tend to snap when you do the wrist test. Brambles are quite good to use at this time of year (better in autumn as other sp, but tougher than willow etc) just need de thorning with thick leather gloves on... Id go for dried and then soak if you are keen to do it now... Hills have been reasonable when Ive been doing willow work in the past - not as well graded as somerset willow, but LOADS cheaper if you are not needing that (ie for fine basketry work). Enjoy!