For the best flavour, leave citrus fruits on the tree until they naturally drop when lifted. Blood oranges especially benefit from slightly cooler, frost-free nights in autumn to develop their deep red pigmentation. Water from the top, ensuring excess water drains away, and let the soil dry out between watering—adjusting frequency based on the season and plant conditions.
Position your citrus tree in bright light, away from radiators, and consider moving it outside during summer, bringing it back indoors before temperatures drop below 5°C. Blood oranges prefer a bit more sun than other citrus varieties to encourage good fruit colour.
Use citrus feed with each watering in summer and every 10-14 days in winter. If new growth appears pale, apply a citrus feed to correct nutrient deficiencies. Grow in citrus compost, repotting or top-dressing in late winter. Avoid drafts and sudden temperature changes for best results.