Market-gardening, especially horticulture, is extensively practised in the vicinity, so that Haarlem is the seat of a large trade in Dutch bulbs, especially hyacinths, tulips, fritillaries, spiraeas and japonicas.
North of Haarlem to twice that distance south, hyacinths, tulips, narcissus and crocuses being the flowers chiefly cultivated.
Though in many instances, as in hyacinths, they are less beautiful than single ones, they always present the advantage of being less evanescent.
Pot hyacinths, tulips and other bulbs for forcing; and propagate half-hardy plants by cuttings.
Flowering annuals are mainly aquatic. Water lilies, water hyacinths, which are an obstruction in many streams, and irises in rich variety give colour to the coast wastes and sombre bayous.
Hyacinths and other bulbs derive benefit from slight doses, while to asparagus as much as 20 lb to the rood has been used with beneficial effect.
This mode of potting does well for bulbs, such as hyacinths, which are either thrown away or planted out when the bloom is over.
A supply of roses, kalmias, rhododendrons, &c., and of hardy flowers and bulbs, as lily of the valley, hyacinths, tulips, daffodils, &c., should be kept up by forcing.
Protect stage auriculas and hyacinths from extremes of every description of weather; and tulips from hoar-frosts and heavy rains.
Begin to force roses, hyacinths and a few other bulbs, for winter and early spring decoration.
Plant hyacinths in glasses for windows.
Plant the greater part of the common border bulbs, as hyacinths, narcissi, crocuses and early tulips, about the end of the month, with a few anemones for early flowering.
Continue the forcing of roses, hyacinths, &c. Houses containing large-flowered Japanese chrysanthemums will require to be kept dry, airy and moderately warm to prevent " damping-off " of petals.
Hyacinths and other bulbs that have been kept in a cellar or other dark cool place may now be brought into the light of the greenhouse or sitting-room, provided they have filled the pots with roots.
Hyacinths, tulips and other spring bulbs may be dug up, dried and placed away for next fall's planting, and their places filled with bedding plants, such as coleus, achyranthes, pelargoniums, and the various white and coloured leaf plants.
Dutch bulbs, such as hyacinths, tulips, crocus, &c., and most of the varieties of lilies, may be planted.
Cover up all beds in which there are hyacinths, tulips and other bulbs with a litter of leaves or straw to the depth of 2 or 3 in.
The principal market products are cauliflower, cabbage, onions, asparagus, gherkins, cucumbers, beans, peas, &c. The principal flowers are hyacinths, tulips, crocuses, narcissus and other bulbous plants, the total export of which is estimated at over 200,000.