LANDSCAPING : Before 03h39 (UTC), the ascending moon in its final flower-sign hours gives ornamental plantings one last lift — a narrow but worthwhile window. Deadhead any remaining winter-flowering pansies (Viola wittrockiana) and remove yellowed foliage from hellebores (Helleborus orientalis, H. foetidus) to expose emerging buds and improve air circulation / Cut back the spent flower spikes of ornamental grasses such as Miscanthus sinensis and Pennisetum alopecuroides to about 15 cm above ground level, bundling the cuttings for wildlife shelter / In sheltered gardens, check sweet box (Sarcococca confusa) for scale insects on stems; wipe affected areas with a damp cloth dipped in diluted neem solution.
VEGETABLE PATCH : After 03h39 (UTC), the ascending First Quarter moon shifts into a leaf-sign, directing energy toward foliage and leafy crops — a reliable stretch for everything green and above-ground. Sow winter lettuce varieties (Lactuca sativa ‘Winter Density’, ‘Arctic King’) and corn salad (Valerianella locusta) in seed trays under cover, pressing seeds 1 cm deep in moist multipurpose compost, spacing 3 cm apart before thinning / Transplant young spinach (Spinacia oleracea) and mizuna (Brassica rapa var. japonica) seedlings into a cold frame or polytunnel, spacing plants 15–20 cm apart — the ascending moon encourages strong uptake of nutrients through leaf tissue / Harvest outer leaves of chard (Beta vulgaris var. cicla) and kale (Brassica oleracea ‘Nero di Toscana’, ‘Red Russian’) by cutting 5 cm above the crown to keep the plant producing through winter / In Mediterranean climates, direct-sow land cress (Barbarea verna) and rocket (Eruca vesicaria) outdoors in a sheltered bed; on heavier soils, add a handful of sharp sand per 30 cm row to prevent waterlogging.
INDOORS : A good day to tend leafy houseplants now that the moon supports foliage growth. Wipe the broad leaves of Swiss cheese plant (Monstera deliciosa) and rubber plant (Ficus elastica) with a damp microfibre cloth — removing dust genuinely improves photosynthesis under winter’s low light / Water sparingly: most indoor foliage plants need no more than 200–300 ml per 20 cm pot in December, and cold, wet compost is the main cause of root rot at this time of year / Pot on any peace lilies (Spathiphyllum) or Boston ferns (Nephrolepis exaltata) that have become root-bound, moving up just one pot size and using a peat-free loam-based mix.