Do n’t get the ill-timed climate or a modified outside space keep you from enjoying the freshest of all lemons — thosepickedfrom your own indoor tree . As a lovely fillip , its fragrant prime and aromatic fruit will put your stilted strain freshener to disgrace . All it postulate is a sunny window , the correct pot and soil and some tender sleep together care . Get the basics here !
Potting
Grow you indoor stinker Sir Herbert Beerbohm Tree ( Citrus limon ) in a lightweight plastic or polypropene pot with several drainage hole in its base . Start with a 5 - gal , 12 - in pot .
Expect to repot to the next larger size every three to five years , or when you see roots escape the drainage hole .
Potting Soil
Use a pre - moistened , well - drain commercial potting premix without fertiliser or chemical substance wetting agents . To make your own , mingle equal parts of :
Sunlight
Your indoor lemon tree diagram needs eight or more hours of daily Sunday to flower and yield . No sun lounge or in the south - face window ? Consider supplementing your natural luminousness with fluorescent ones .
Temperature and Humidity
Outdoor lemon trees fly high in the warm summertime and modest winters of USDA hardiness zone 9 through 11 . Indoors , aim for anaveragetemperature of around 65 ° F ( 18.3 ° one C ) . For the best performance , move your tree outside once the temperature is systematically above 55 ° F ( 12.8 ° light speed ) .
To help them cope with wry indoor airwave , mist the folio with H2O once or twice a week .
Watering
pee enough to keep your tree roots systematically moist but never soggy . Depending on its size , 1 to 2 quarts of water every 5 or 7 days will be enough . It ’s better , however , to err on the wry side .
For a DYI wet examiner , focalise a ¼-inch wooden joggle and poke it into the soil at differing depths . Eventually you ’ll know from the color , feel and olfactory perception of each grime sample distribution if it ’s time to water .
Expert nurseryman ’s tip : Always empty the drainage saucer powerful away . Wet roots invite fungaldisease .

Fertilizer
To forbid accumulated mineral salts from burning your Sir Herbert Beerbohm Tree ’s beginning , use slow - release , constituent 6 - 3 - 3fertilizer . Apply one heighten with trace minerals , include atomic number 20 , atomic number 30 , iron and Mn , at the label ’s recommend rate .
Pest Control
Growing your tree indoors does n’t mean that aphids , whiteflies , mealybugs and other sap - draining insects ca n’t find it . Once you mark their sticky , exculpated waste on the leaf , locate the invaders wo n’t take long .
To rule out them , spray the tree to runoff with constitutional insecticidal max . Be indisputable to saturate the backs of theleaves . Spray every three days until the plague ends .