Fertilization should vary according to different growth periods.

According to the different fertilization time of orchid plants, it can be divided into germination fertilizer before germination, root and flower fertilizer for leaf bud slow growth, growth fertilizer for leaf expansion period, ripening and cold resistance fertilizer at the end of autumn, dowry fertilizer for half a month before pot division, Su fertilizer for spring warmth, root fertilizer for few roots and moon fertilizer after flowering.

(1) Fertilizer for breaking dormancy, promoting early germination, and striving for more than one bud per year. When the temperature of the day is not lower than 18℃ and the temperature of the night is not lower than 3℃, the fertilizer can be applied. Often choose 0.1% potassium nitrate compound fertilizer solution, 0.02% ammonium bicarbonate solution or 0.1% decomposed human urine irrigation application once;10 days later, and then with Lanjunwang 500 times solution irrigation application once. Every 5 days, foliar fertilization is carried out alternately in the evening, spraying "Shida" 500 times solution or "Huabao" 4 1000 times solution, and mixing 2000 times urea solution and 250 times edible rice vinegar solution.

(2) The germination fertilizer is about 15 days after the application of the fertilizer, and then the fertilizer is the same as the fertilizer, or the 500-fold "Lanjunwang" solution is applied once. Foliar fertilizer is applied in the same way as soil-accelerating fertilizer.

(3) Promoting root and flower fertilizer When the new bud is 3~5 cm long from the substrate surface, there will be a pause extension period. At this time, the new bud will grow roots, the mother plant temporarily stops supplying nutrients to the new bud, turns to reproductive growth, begins to form flower primordia and differentiated flower buds, and needs less nitrogen, phosphorus, potassium and boron nutrients. Therefore, potassium dihydrogen phosphate 1500 times solution should be applied once a week, and 1000 times solution of "Huabao" 3 mixed with boron element should be sprayed once every 5 days.

When the new bud has grown 2 cm long roots, the differentiation of flower buds is also a foregone conclusion. At this time, the sprouts urgently need complete nutrient fertilizer. Often with O. 15% potassium nitrate compound fertilizer, or retting organic liquid fertilizer 1000 times liquid, every 15-20 days Shi shellfish times. Foliar spray once a week Huabao No. 5, or 1000 ~1500 times solution of American Gaole and Greenway No. 2 (line orchid is not available). Swiss production of love Shi licensing foliar fertilizer, Fujian Province production of high-yield spirit, plant health element (line art orchid available) and so on.

Line art orchid, crystal art orchid, picture spot art orchid, should not be applied with high nitrogen content and magnesium foliar fertilizer. When pouring liquid fertilizer, the concentration should also be reduced by half. Foliar fertilizers with low or no nitrogen content include plant comprehensive mineral health nutrient, potassium dihydrogen phosphate, speed and so on.

(5) Apply fertilizer five times 15-20 days before flowering. Root fertilizer can be selected 500 times the retting organic liquid fertilizer, or 0.1% potassium nitrate compound fertilizer, add 1500 times potassium dihydrogen phosphate. Foliar topdressing can be selected Huabao 3, potassium dihydrogen phosphate 1500 times solution plus 0.2% borax and other alternative spraying.

(6) ripening cold-resistant fertilizer orchid plants before winter, should promote the early development of plant leaves mature, so that the free water in the plant greatly reduced, non-frozen bound water increased, sugar content increased, cellulose increased, in order to enhance cold resistance. Therefore, nitrogen supply should be stopped and phosphorus and potassium fertilizer should be applied from mid-autumn. The method is to spray two or three times with potassium dihydrogen phosphate 1000 times solution.

(7) dowry fertilizer Because the orchid plant has not developed new roots after just dividing and changing pots, it is not suitable for fertilization. Therefore, in order to improve the resilience of the orchid plant to trauma, it is necessary to apply complete liquid fertilizer once half a month before dividing and changing pots. Specific implementation methods can refer to the application of fertilizer.

(8) The flowering of fertile orchids in the moon consumes a lot of money. Only timely supplements will not affect the winter, premature aging and germination of the following year. Often choose retting fertilizer 500 times solution or 0.2% potassium nitrate compound fertilizer irrigation is the second time, and foliar spraying two or three times plant health element and compound trace elements.

(9) Promoting roots and fertilizing seedlings, introducing seedlings, weak seedlings and changing pots may have few roots or no roots, so it is necessary to promote roots. The new orchid seedlings on the pot, because the root system wound is not crazy, the new root does not grow out, at this time fertilization is easy to cause the wound to fester, leading to new rotten roots. Therefore, it is not appropriate to apply general fertilizers; only when watering, with the application of American-made root growth promotion 1500 times solution or orchid king 500 times solution. In addition, the diluted solution of the root promoter can be sprayed every 3 to 5 days in the evening. (Xu Dongsheng)