COLD GREENHOUSE, 145 



sold by the trade. Any bulb dealer will supply a suitable 

 collection of Dutch varieties adapted for pot culture. We 

 would, however, specially commend to the enthusiastic 

 amateur and possessor of a cold house the cultivation 

 of such lovely forms as billietiana, yellow and red; clu- 

 siana, rose, red, and violet; Didieri, crimson, indigo, and 

 primrose; elegans, crimson, vermilion, and yellow; Greigi, 

 orange, scarlet, and black; kolpowskyana, yellow and 

 rose; peisica, yellow and bronze; retroflexa, yellow; and 

 vitellina, yellow, as specially interesting kinds to grow in 

 pots. See also the selections on p. 172. 



Tulips of any kind do well grown in a compost of two 

 parts loam, one part decayed manure, and one part coarse 

 silver sand. Plant three in a 5in. or four in a Gin. pot 

 early in November, burying the bulbs so that their apex 

 just shows through the surface. Make the compost quite 

 firm. The species named above should be plunged in 

 fibre refuse in a cold frame until growth begins; then be 

 removed to the cold house. The early-flowering sorts 

 should be treated similarly, but, if wanted early, be trans- 

 ferred first to the cool and then to the warm houses by 

 easy stages, but as soon as the flowers open they will last 

 longer in perfection if placed in the cold house during the 

 flowering season. Those that flower naturally in May, 

 and which are described in the list of hardy bulbs, are best 

 not subjected to heat, but kept in the cold house. Due 

 Van Thols, required to flower at Christmas or soon after, 

 should be potted in August or early in September. After 

 flowering, transfer all kinds to the cold frame to complete 

 their growth. When the leaves fade take the bulbs from 

 the soil, carefully dry and store them in a cold place till 

 October or November. Choice kinds may be repotted 

 then, but ordinary Dutch forms, or such as have been 

 forced, are best planted out in the garden and new ones 

 purchased for pot culture. During the growing period give 

 an ample supply of water; when at rest give none. 

 Increased by offsets. 



L 



