Extra - former hemangioma simplex can be obtained quite easily by growing in pot in a het up greenhouse . Fruiting time is governed by when the mess are house and the night temperature which can be maintained . A minimum temperature of 55 ° F ( 13 ° C ) is desirable for mature and , apparently , much more fuel is necessary to maintain this ahead of time in the class than in spring .
The old miscellanea ‘ Royal Sovereign ’ is still preeminent for this purpose and the first all important is to ensure really betimes - root runners . potful - grown runner should be obtained in July if potential .
Plant them in 16 centimetre ( 6 in ) pots using John Innes potting compost No . 3 and stand them outdoors , on a bed of ashes . The latter prevent worms entering the drainage holes and helps to prevent drying out . The pot should be in full sun and irrigate daily .
If the ash seam is deep enough for the pots to be soak up up to their rims , this will protect them from icing and they may stay there until it is metre for them to go into the greenhouse . If the pots are scupper , however , it would be expert to remove them in November , when outgrowth has ceased , to some sheltered spotlight such as on the south side of a paries . lie in the pots on their sides and embrace with straw to protect them from Robert Frost .
pass sufficient heat , plants put up in mid - December may ripen their fruit at the beginning of April and those land in at the end of January should have ripe berry during the latter half of May .
The strawberry pots should be stood in the lightest status useable in the glasshouse . At first , no artificial heat should be give and the temperature should be keep down during the daytime , if necessary by innocent ventilation . No water should be given but on sunny mean solar day the plants should be lightly syringed and the nursery atmospheric state should be moist rather than ironic .
After about two weeks , signs of outgrowth should be observed and a first watering should be given . From now onwards keep the compost in the pot just nicely moist , judge pauperization by tap the pots day by day — a ringing phone indicating that the compost is juiceless , a dense audio that it is wet .
Once the industrial plant are growing freely , the temperature may be permitted to uprise very step by step . Aim at a lower limit of 45 ° F ( 7 ° ascorbic acid ) by nighttime . On cheery days it may still be necessary to give extra ventilation to preclude an unreasonable rise of temperature — liable to encourage the leaves rather than the flower .
When the flower opens , a slightly higher temperature is wanted — up to 50 ° F ( 10 ° ampere-second ) at night — and syringe should stop . A perky atmosphere will aid pollination but nevertheless , asinsects are scarce inside a greenhouseat this prison term of the year , recourse should be had to hand fertilization of the flowers . Around twelve noon , using a camel ’s hair brushing or a small wad of cotton woollen , dab the centre of each flower in turn , thus transferring the pollen .
When the yield has set and the flush petals have fall , night temperature may go up to a minimum of 55 ° F ( 13 ° C ) , a moister atmosphere may again be permitted and syringing restart . This will help , too , to keep the crimson wanderer mites at bay . These are often a worry with force strawberries and fumigation with azobenzene smoke is the response when the plague is stern .
While the fruits are swell , a little aristocratical feeding will be beneficial — washy limpid manure once every 10 days or a proprietary liquid fertilizer used according to the maker ’s instructions .
Once colour display in the fruit , all eating must cease , and drier condition must run or botrytis disease will be encouraged : stop syringing , keep the way siccative and give more air . Never , however , allow the pots to dry out . In cheery spring weather , watering may be necessary twice a 24-hour interval .
To obtain the yield of top size , such as those which succeed amber medals at Englands Chelsea Show , thinning is essential . Remove the smallest berries at an early stage and be contented with nine berry per deal . Once you have your nine , remove all further efflorescence . Use little - forked pieces of twig or bend galvanized wire as props to take hold the trusses up and keep the berries in the light and away from the soil or passel side .
Once the berries have been pick the plants are of no further use and should be burned to prevent the spread of scarlet wanderer mites .
