Gadenin日本語Get the appPut it where the scent reaches you
The scent is the reason for growing this plant. It is a warm, clove and honey smell that carries several yards on still air, and it is strongest from late afternoon into the evening, when the flowers release most heavily and the air stops moving. A bed of stock at the far end of the garden is largely wasted; the same plants beside a door, along the edge of a path you use at dusk, or immediately behind a bench, are a different plant altogether.
In a container the effect is stronger still, because you can put the pot at nose height on a step or table and move it as the season shifts. Three or four plants in a twelve inch (30 cm) pot of gritty potting mix, stood by the back door, will scent a whole doorway. Group plants rather than spacing them out: scent from a clump reads as a presence, while scent from single scattered plants reads as an occasional puzzle.
Shelter matters as much as position. Wind strips the scent away before it reaches you and rocks the tall spikes at the base. A corner with a wall or a hedge behind it holds both the plant and the smell.
| Position | How well the scent works | Why |
|---|---|---|
| Beside a door or gate | Excellent | You pass it every evening, and walls hold still air |
| Behind or beside a seat | Excellent | You are stationary at the time of day it is strongest |
| Along a narrow path edge | Very good | Brushing past releases it, and the path funnels air |
| In a pot on a step or table | Very good | Height puts the flowers near head level |
| Open, windy border away from the house | Poor | The scent disperses before anyone is there to notice |
Water steadily, but never let it stand wet
Stock wants soil that is evenly damp and sharply drained, which sounds contradictory until you handle it. Water thoroughly and then leave it until the top inch (2.5 cm) has dried, rather than sprinkling daily. A deep soak every three or four days in cool weather, and daily in a pot during a hot spell, is the right rhythm.
Overwatering shows first at the base of the stem, which goes soft and darkens, and then as lower leaves yellowing while the top still looks fine. That is stem rot beginning, and it is almost always fatal once it has ringed the stem. Wet, cold ground in the weeks after planting is the classic cause. If your soil is heavy, raise the bed a few inches or work grit into the planting area before you plant anything at all.
Water at the base, not over the head. Wet foliage overnight in still, cool air invites downy mildew and gray mold into the spike, and a soaked flower head browns and hangs. This is a plant to water in the morning.
In containers, a saucer left full of water will kill stock faster than a week of drought. Tip saucers out after watering, and stand pots on feet so the drainage holes stay clear.
Feed lightly, and stop before flowering
Stock flowers better in moderately fertile ground than in rich ground. Heavy nitrogen produces a big leafy plant with a short, loose spike, soft growth that flops, and a marked increase in aphid trouble. If the bed was manured for a previous crop, that is already enough.
The useful feed is a balanced liquid feed at half strength every two or three weeks while the plants are building leaves, switching to something lower in nitrogen and higher in potassium once you can see the flower spike forming. Then stop. Feeding a plant that is already in bud gains nothing and shortens the life of the flowers.
In pots the rule is different only in frequency, because watering leaches the compost. A weak feed with every second watering from planting until the buds color is about right, and again, it stops once the spike opens.
Support, pinching and deadheading
Tall kinds carrying a heavy single spike will lean, and once a stock has leaned it does not straighten. Push in a thin cane or a few twiggy sticks while the plants are still short, so the stem grows up through the support rather than being tied to it after the event. Grow-through netting laid flat over the bed and raised as the plants rise does the same job across a whole row.
Whether to pinch depends on the kind you are growing. Branching types respond well to having the growing tip nipped out at four or five true leaves: you lose the single big spike and gain five or six smaller ones over a longer season. Single-spike types must never be pinched, because the one spike is the whole plant, and pinching it simply destroys the crop.
Deadhead by cutting the whole spent spike back to a leaf joint rather than picking off individual florets. On branching kinds that prompts side shoots and extends the season by several weeks. On single-spike kinds it does nothing for the plant, but it keeps a bed of browning heads from looking derelict, and it stops gray mold establishing in the dead petals.
Cutting for the house is deadheading by another name and does no harm at all. Cut in the early morning when the stems are full of water, take the spike when about a third of the florets are open, and strip the leaves that would sit below the water line, because stock foliage rots fast in a vase and is the reason the water smells.
Keep a note of what worked
The single most useful record for this plant is where each group stood and whether the scent actually reached you. Write down the position, the number of plants, and a plain judgement at the end of the season. Gardens differ enormously in how they hold still air, and the only way to find the good corners is to write down which ones worked.
Alongside that, note the date the first spike opened and the date the last one finished, and whether you pinched. A season where pinched plants ran four weeks longer than unpinched ones is a fact worth having, and it is exactly the sort of thing nobody remembers accurately the following spring.