I planted a Picea pungens 'Koster' in a fairly shaded spot in my garden about 18 months ago. I knew it liked sun but I thought it was to develop the best colour.
It is still growing but the leader started flopping over last year so I’ve put in a stake to hold it upright. I thought it was maybe a lack of water/food so I’ve been providing that (and it has put out 2 inches of new growth this year) but the main stem doesn’t want to strengthen and hold the plant.
Is there anything else I can do other than move it to a full sun position and hope that’s the problem?