A Detailed Guide to Spaghetti Squash Planting Time and Growing Techniques
When spaghetti squash is unprocessed, its fruit is no different from other squashes, very squash-like and firm; once cooked, its flesh falls away in strands, much like spaghetti. The skin of spaghetti squash is fairly hard and has a waxy layer, so it withstands long-distance transport and can be stored from summer and autumn harvest all the way until the Spring Festival for sale. If you are artistically inclined, you can even carve words and flowers on the skin to increase its market value. So when is spaghetti squash usually planted? What are the key growing techniques?
1. Spaghetti squash planting time
Spaghetti squash is generally not harvested for its tender fruit. In the Yangtze River basin region, seedlings are raised under protection in early to mid-March, transplanted to open ground in early to mid-April, and mature fruit is harvested from early July to August, which can be stored and supplied until winter. Reverse autumn cultivation can also be carried out using protected facilities, that is, raising seedlings under shade netting in mid to late July, transplanting in early August, and harvesting mature fruit from late September to October. With greenhouse covering in mid to late October, harvesting can continue until mid-November.
2. Spaghetti squash growing techniques
1. Grow strong seedlings
For spaghetti squash, the sowing date can be arranged according to local cultivation habits and climate; it can be direct-sown or raised as seedlings for transplanting. To save seed and achieve early maturity and high yield, the seedling transplanting method is used more often. The seedling period is generally about 20 days before the last frost; in the Beijing-Tianjin area, around April 5. Use 6 cm × 6 cm or 8 cm × 8 cm nutrient pots filled 3/4 with nutrient soil (made by mixing fertile soil that has not grown cucurbit crops with high-quality coarse manure at 3:1), carried out in a solar greenhouse or greenhouse. Soak the seeds in 55°C hot water for 10 minutes or treat them with a fungicide to kill pathogens on the seeds, then soak in warm water for 2 to 3 hours, wrap in a wet cloth, and germinate at 25 to 30°C. After sprouting, pick out the sprouted seeds and place them flat in pots already soaked through with water, 1 seed per pot, cover with 1.20 cm of nutrient soil, apply heat to promote germination, and seedlings emerge uniformly in 3 days. After the seedlings are uniform, ventilate appropriately to encourage strong seedlings.
2. Transplant at the right time
When the seedlings are about 20 days old and have 3 true leaves, they can be transplanted once the last frost has passed. Use high-ridge cultivation; adding plastic film and a small arch shed is even better. Plant spacing is 1.50 m × 0.45 m, with 850 to 1,000 plants per mu, planting in water-filled holes.
3. Fertilizer and water management
Before planting spaghetti squash, plow the land deep and rake it level; the soil must be fertile with sufficient fertilizer. Apply 3,000 kg of high-quality organic fertilizer and 50 kg of multi-element compound fertilizer per mu, deeply applied underground. Within 5 days after planting, irrigate once to promote recovery from transplanting. When the fruit reaches 100 g, water promptly to swell the fruit, and apply 20 kg of urea with the water to ensure the needs of the spaghetti squash's reproductive growth.
4. Vine training and pruning management
Spaghetti squash has lush branches and leaves, so it must be pruned in time. When the vines close over the garden, pinch off old leaves and mound more soil to stabilize the vines. Keep 2 to 3 vines and train them in the same direction. When the main vine of spaghetti squash has 13 leaves and the side vines have 5 to 8 leaves, a large number of female flowers will appear. During peak flowering, strengthen hand pollination, carried out before 8 a.m. each day, to concentrate the fruiting period. Keep 1 fruit per vine and thin out the rest. When the vines are trained onto the ridge, pinch off all growing tips in time, and afterward remove all tip branches as they appear, so as to ensure that nutrients are largely directed into the fruit and more large fruits are set.
5. Pest and disease control
Spaghetti squash grows in the field for more than two months and has relatively few pests and diseases. Before planting, when digging trenches and forming ridges, apply poisoned bait along the ridges to control underground pests. During the growing period, if aphids appear, treat them with pesticides at any time. Spaghetti squash is susceptible to powdery mildew once it enters the fruit-setting stage. If disease spots appear, promptly treat with pesticides such as triadimefon, once every 7 days, for 3 consecutive applications, to keep the seedlings healthy and strong.
6. Harvest and storage work
20 days after pollination, the fruit of spaghetti squash no longer increases in size, and by 30 days the fruit is fully mature, the plant rapidly ages and dies, and at this point it can be harvested in stages or in a single harvest. When harvesting, cut off the fruit stem with a knife, store the fruit in a dry, ventilated place or a cold storage facility, and it can also be sold on the market at any time. After harvest, if deep processing is carried out, there are many methods: it can be dried, bagged, canned for fresh-keeping, or made into preserved fruit, candied fruit, and other foods with different flavors.