Register with us or sign in
How big is the patch and what sort of soil cover do you have? Are you in the north or the south?
And when you say 'hill' how high are we talking about and when you say 'cover from trees' what sort, how big and how close?
Also is this a rural spot, coastal or near a city?
You probably need to plant young, small specimens so that they can establish well and are not so buffeted by the wind whilst getting their roots set down.
Re your list
Ceanothus like to be relatively sheltered so I wouldn't recommend it.
The others ideally like full sun so it depends on whether your height compensates for the NE aspect? if a bit too shaded that combined with the wind may mean they don't thrive. I think the Buddleja and spirea probably would be safer bets that the weigelia.
Some suggestions - these are all plants that cope with coastal or exposed positions so should tolerant wind and will be ok with the aspect
Ribes sanguineum Edward VII
Viburnum opulus 'Xanthocarpum' or V.tinu 'Eve Price'
Euonymus europaeus 'Red Cascade'
The hardy fucshias like magellanica or Riccartonii should also be ok, esp. if planted small say 1tr max so they can establish before too much buffeting.
Cotoneaster, Hypericum, Kerria and Lonicera nitida are all tough as old boots and should thrive.