Sow mignonette, stocks, &c., in pots; sow sweet peas and a few hardy annuals on a warm border.
Head back stocks preparatory to grafting.
Of those that are liable to suffer injury in winter, as the Brompton and Queen Stocks, a portion should be potted and wintered in cold frames ventilated as freely as the weather will permit.
Matthiola incana (two groups, the Brompton and the Queen stocks): hardy, 2 to 21 ft., white, red and purple.
The stocks are commonly divided into two classes: - (1) free stocks, which consist of seedling plants, chiefly of the same genus or species as the trees from which the scions are taken; and (2) dwarfing stocks, which are of more diminutive growth, either varieties of the same species or species of the same or some allied genus as the scion, which have a tendency to lessen the expansion of the engrafted tree.