Christmas Bulbs, and a Scent People Argue About
Paperwhites are the narcissus that flowers indoors at Christmas. Clusters of small pure white flowers on a green stem, forced from bulbs in a bowl of pebbles and water, from planting to flowering in three to five weeks with no cold period required. That last part is what separates them from every other bulb.
The scent divides people more sharply than any other flower. Some find it sweet and honeyed; others describe it as sour or faintly like cat urine, and both camps are describing the same compound. There is no middle ground and no point arguing about it.
The classic; Ziva and similar
Softer varieties with warmer cups
Grand Soleil d'Or, a related forced narcissus
The commercial standard; fastest and most strongly scented
Milder scent, the choice for people who dislike Ziva
Shorter and sturdier, less prone to flopping
Yellow with an orange cup, a related forced type
No soil needed. Water just below the bulb base.
Warmth makes them stretch and fall over.
Dilute spirits stunt the stems and stop flopping.
Twine and a stake works as well and is easier.
Buy bulbs that feel heavy and firm with no soft spots at the base and no mould between the papery layers. Size matters here as it does with amaryllis: a bigger bulb produces more stems. If you dislike the scent, ask for Inbal rather than Ziva, which is the standard and the most pungent. Buy them in stages a fortnight apart rather than all at once, and you get flowers through December and January instead of one week of everything.
Bulbs appear from October and the forcing season runs to February. They are cheap, and unlike amaryllis they are genuinely disposable: the bulb exhausts itself in the process and cannot be kept for a second year, which is worth knowing before anyone tries. Prices are lowest early in the season when the bulbs first arrive, and stock thins out after Christmas.
Amaryllis is the other classic forced Christmas bulb, far larger, unscented and reusable for years. Hyacinth forces just as easily with a stronger but generally more popular scent. Grand Soleil d'Or is a paperwhite relative in yellow for anyone who wants the same effect with a different look. For scent-free winter flowers, cyclamen and Christmas cactus are the alternatives.
Paperwhites are toxic to cats and dogs, as all narcissus are. The bulbs contain lycorine and are the most dangerous part, causing vomiting, drooling, diarrhoea and in larger amounts tremors and cardiac effects. Because paperwhites are grown in open bowls at table height with the bulbs fully exposed, they are considerably more accessible to a curious animal than a planted bulb would be. Keep bowls well out of reach.
Once shoots are a few inches high, replace the water with a solution of roughly one part spirits to seven parts water. It stunts stem growth by about a third without affecting the flowers, so they stay upright. Cornell tested this properly. Do not use beer or wine, which have sugars that rot the bulbs.
A cool bright room does most of the same job, and twine round a bowl of stems is less trouble than mixing solutions.
They exhaust themselves forcing indoors and will not flower again. Compost them and buy new ones, which is what makes them cheap.
They stretch in warmth and low light. Keep them cool and bright, or use the alcohol trick: once the shoots are a few inches tall, water them with about one part spirits to seven parts water. It shortens the stems by roughly a third without harming the flowers.
The scent contains indole, a compound that reads as sweet and floral to some people and sour or unpleasant to others. It genuinely divides people. If you dislike it, the Inbal variety is much milder than the standard Ziva.
No. Forcing exhausts them and they will not flower again, unlike amaryllis or hyacinths. Buy fresh bulbs each autumn; they are inexpensive.
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