October 20, 1917 



HOKTICULTURE 



i-n 



ROSE GROWING UNDER GLASS 



CONDUCTED BY 



mil QueetlODB by our readers In line with any of the topics presented on this page wUl be cordl^ly recelvod andpromptly answered 

 by Mr. Buzlcka. Such communlcaUons should InTarlably be addressed to the office of HORTICCLTUKB. 



Ventilation 



Proper attention will now have to be given to the 

 ventilation and air will have to be applied by inches 

 from now on. In the morning, it will pay to leave some 

 steam on until the houses reach 08, when it can lie turned 

 off, and then turned on again when the houses reach 

 66 at night. Be sure to carry air all night unless very 

 windy or stormy. It is poor poUcy to shut down the 

 vents as soon as it gets cool, to save coal. In tight 

 houses a crack of air should be left on unless the tem- 

 perature outside drops to 26. Air will have to be 

 applied gradually in the morning; as soon as the tem- 

 perature reaches 64, add a little more air, then again 

 at 68 and 72, then run the temperature to regular day 

 heat or 74 to 76 on clear days. During cloudy weather 

 it will be best not to allow the temperature to run over 

 68 with 66 as an ideal heat. If warmer, the foliage 

 will surely get soft and trouble with mildew will follow. 

 On partly cloudy and 'clear days a temperature of 72 

 is good. This, however, will be hard to maintain, with 

 continual changes outside. It will save time,' therefore, 

 to add air only when temperatures go over 76 and re- 

 duce when it falls below 68. Steam may be necessary 

 now and then to keep the houses from going below 66. 



Placing The Heat 



As long as only one pipe of steam is needed it should 

 go around the walls of the house, near the front and 

 back if possible. Any additional heat should be dis- 

 tributed between the center and the north side in three- 

 quarter-span houses and distributed evenly in even-span 

 houses. Our experience tells us it is best to have heat 

 just north of ventilators to send a warm current of air 

 up to meet the cold coming from the open vents and 

 warming this or breaking it \ip before it can strike the 

 plants. ITiis will give fresh air and at the same time 

 keep some plants from being chilled liy cold air coming 

 straight down on them from above. 



Feeding 



As soon as the weatiier gets cooler it will be safe to 

 start feeding a little, being careful to apply feed only 

 to plants which are able to take it. Tankage, blood and 

 bone, bonemeal, are all good, especially the latter which 

 can do no harm. The two former should be used care- 

 fully when the plants have just started a new growth. 

 Feeding at this time will give the flowers whicli are 

 coming an extra long stem, and this again will jiut them 

 into the better grades and better prices. With Beauties 

 a mulch of good well decayc'l cow manure will be 

 needed. With Teas, if plenty of manure was used in 

 the soil, only enough mulch should be applied to pro- 

 tect the roots, depending on other feeds to keep the 

 plants going. The Tea varieties will be much easier 

 to handle during the winter months if they are not 

 mulched too heavily. Apply enough manure to keep 

 the surface of the soil open and rough so it will not 



wash when watering. Then apply feed as needed. Be 

 careful not to have the plants too dry when feed of any 

 kind is given, and be sure to follow with hose if manure 

 is applied. 



Crown-Gall 



This disease seems to be more plentiful than ever 

 and the, only thing to do is to keep right after it and 

 cut it off and burn it as soon as it appears anwhere. 

 Cut right down to the clean wood when removing the 

 diseased portions, and where it is possible take off the 

 whole branch. As near as I can tell, crown-gall appears 

 to be the same as black-knot of the cherry and plum or 

 tree cancer. It will, therefore, be well to clean it all 

 out on such trees around the place and avoid using soil 

 coming from the vicinity of these trees. ' 



Tying 



Keep right after this end of the growing, especially 

 in the Beauty houses. If the plants lie around too 

 long they are likely to get diseased, and in many cases 

 the growth will go blind, being of little use to the plant. 

 A\lien Beauties are tied, see that all the long stems are 

 Icept on the same side of the wdre all the way up. If 

 this is not done it will be hard work to bend down the 

 long growths when it liecomes necessary to do this. 



Clean Out the Spider 



Xow is the time to clean out red spider if it is any- 

 where among the plants. There may be only one little 

 nest, but even this should not be allowed to exist, 

 ^lark all places whole there are nests and see that these 

 leceive an extra good syinging when the clear day 

 comes. Often it w-ill pay to go around and syringe these 

 places even when the rest of the plants are let go. If 

 thev are not cleaned up now it will be more troublesome 

 later; besides the wood for propagating is likely to be 

 infested and will prove troublesome as the cuttings can- 

 not be syringed, but only dipped before being put into 

 sand, and even that is not always effective as air bubbles 

 will form under the leaves and these will hide insects 

 and protect their eggs. We can never tell what kind 

 of w'eather is in store for us, and should a dark winter 

 follow, it would be discouraging to have spider creep 

 through the plants. 



Blackspot 



Be on the watch for this, as it will likely creep in one 

 place and spread a good deal before the grower will 

 realize what is happening. Pick off and burn any spot 

 that may show. Pick it when cutting, tying, watering 

 or doing anything arouinl the plants, for if this is not 

 done the spot is bound to spread. This is the time of 

 the year for it, too, and sliould the plants get a good dose 

 of it now, they will hardly amount to anything until 

 spring. Go through them once a week and remove all 

 diseased leaves, use plenty of air slacked lime after 

 watering or syringing, aiul avoid wotting tlie foliage 

 when watering on clondy days. 



