Sweet Peas have two principal foes, the slug and the sparrow.  Against the former the usual precautions, such as ashes, old soot, lime, and various traps, are available; and the latter must by some means be prevented from doing mischief.  After the buds show through the soil, it is generally too late for the adoption of remedies.  Nearly all the heads will be found nipped off and laid ready for inspection.  One could almost forgive the marauders were food the object, but the birds appear to commit havoc from pure wantonness, and whole rows are sometimes destroyed in a single morning.

Early sprays are so much prized that the practice of flowering Sweet Peas in pots under glass is yearly increasing, and for this purpose seed must be sown in August or September; the plants to be kept slowly moving during the dark days.  In February the growth will be more rapid, but it is important to give the plants the hardiest possible treatment.  In April, if properly managed, there will be a brilliant display.

The winter-flowering race blooms freely at a still earlier period, although the plants are less vigorous than other varieties.

==Sweet William==

==Dianthus barbatus.  Hardy biennial==

Sweet William belongs to the same genus as the Pink.  The finest strains produce superb heads of flowers, some of them intensely rich in colour, while others have a contrasting edge.  The new varieties are so marked an advance on older colours that they have created a fresh interest in this favourite garden flower.

In several instances we have advised that biennials and perennials should be treated as annuals, both on the ground of economy and for the excellent results obtained by this practice.  But the Sweet William is not amenable to any treatment which reduces the natural period of growth.

Seed may be sown in May, June or July for transplanting in autumn, and the numerous colours afford opportunity of obtaining a great diversity of splendid effects in beds and borders.

==Tobacco==—­=see= ==Nicotiana==

==Torenia==

==Greenhouse annual==

Sow in a warm temperature in March or April.  Prick off while small into pots, and subsequently pot the seedlings singly.  Any fairly good compost will suit them.  The branches need support, and the plants must be kept free from green fly.  The Torenias make very elegant pot plants, and they are also well adapted for hanging baskets and other ornamental contrivances.

==Tropaeolum==

==Nasturtium, or Indian Cress.  Hardy and half-hardy annuals==

The =Tropaeolum tuberosum= is treated under the ’Culture of Flowering Bulbs,’ so that here we have only to consider the varieties that are grown from seed.  There are two distinct classes, both widely cultivated, for the seed is inexpensive, and the plants extremely showy durable, and easily raised.