Nasturtiums need room for their stems and a container suited to the variety, with trailing and climbing forms benefiting from thoughtful placement. Check drainage and the plant's growth before adopting a fixed feeding schedule.
Choose the growth habit
Nasturtiums include compact and trailing forms. Check the named variety before choosing a pot, because a small bushy plant needs different space from one whose stems spread over an edge or along a support.
Give stems room without crowding
Place the container where it receives suitable light and where stems can grow without becoming entangled with neighboring plants. Support longer growth gently where needed, rather than pulling a soft stem into a tight shape. A good display still leaves access to the soil surface for moisture checks.
Keep care proportionate
Use a container with drainage and check the root ball before watering. Consider what nutrients are already present in the growing medium before adding feed. Do not increase fertilizer simply to meet a holiday flowering target. As the plant grows, watch new shoots and buds and adjust care to the actual conditions rather than a fixed sequence of dates and temperatures from another climate.
Related reading: Nasturtium Care: Light, Stems and Root Moisture.