184 GARDENING INDOORS AND UNDER GLASS 
only when the bed has begun to dry, and then until 
the bench is soaked through. Pots will, of course, 
require more frequent attention in this matter than 
a bench. Keep all old leaves picked off and the soil 
stirred about the plants, with syringing and fumi- 
gating as suggested on page 134. The temper- 
ature will be best as low as forty-five degrees 
at night, and as little above fifteen more in the day- 
time as possible. Where no artificial heat can be 
had, a fine crop through the spring months may be 
had by making a smaller frame inside the regular 
coldframe, and packing this space with fine dry 
manure, as well as banking the outer frame. This 
arrangement, with two sash and mats in the coldest 
weather, will keep the plants growing most of the 
winter, and certainly the abundance of fragrant 
blooms at a season when flowers are most scarce will 
amply repay you for the trouble. Some prefer the 
single to the double blossoms. Marie Louise and 
Lady Hume Campbell (double blue); Swanley 
White, and California and Princesse de Galles 
(single blue) are the best varieties. Plants may be 
purchased of most large florists or from seedsmen. 
FERNS 
Many of the decorative ferns may also be grown 
to perfection in the small house, at a moderate 
temperature, fifty to sixty degrees, the nearer sixty 
