Position: Full sun, particularly important to reduce needle size. Make sure the pot is not getting too hot during the summer months. A hardy species, but still some protection from extreme frost is a good practice for potted specimens with delicate root system.
Watering: Ensure frequent, regular watering as well as good soil drainage. Excessive, permanent moisture and scarce soil aeration could favour root rot problems.
Feeding: Feed generously during the whole growing season to favour wood formation, vigourous sprouts and back budding. Reduce instead or even entirely suspend fertilisation from spring until the new growth has hardend off to reduce needle size.
Repotting: Scots Pines are among the few species that prefer to be repotted in late Summer to early Autumn to benefit from the subsequent generous root growth. They can be repotted every 3 to 5 year (depending on maturity level) by delicately removing old soil from within the roots (you can be relatively aggressive on young and vigourous plants, be more delicate on mature or weak specimens by only removing 50% of the soil) and replace it with fresh, better draining soil. Root pruning should also be moderate and commensurate to the plants vigour. Do not reduce the canopy, as the needles stomates will reduce transpiration according to roots capacity, while the foliage mass photosynthetic activity will favour healing and new roots formation in the pot.
Soil Ph: Target a neutral soil, while it can tolerate both slightly acidic and slightly alkaline conditions.
Pruning: Avoid excessive reduction of the canopy (e.g. beyond 50% in one single styling) and do not perform more than one wiring/pruning or repotting treatment in any 12 months period.
Wiring: Branches are typically quite flexible and can be bent even also with guy wires even when relatively mature. Wiring should be performed in late Summer/Early autumn.
Pests and Disease: Aphids, scale insects and spider mites are common, rather easy to care for pests found on Pinus. Less frequent but more difficult to get rid of are fungal problems that should be tackled quickly or could rapidly deteriorate. It is essential to maintain good sun exposure and ventilation to minimise the risk of fungal problems affecting the plant.