When Do Peonies Bloom? An Introduction to the Latest Blooming Period

In the late Qing Dynasty, the peony was once regarded as the national flower of China. The peony is also hailed as the second of China's top ten famous flowers. It is a valuable woody flower unique to China, with thousands of years of natural growth and more than 1,500 years of cultivation history. Many people do not know when peonies bloom, so let's take a look together below!

When do peonies bloom?

Like other flowers, peonies bloom in spring and summer, generally flowering in April to May, with the blooming period in May and the fruiting period in June. If you want to admire peony flowers, be sure not to miss the timing.

How can the blooming period of peonies be extended?

1. Prevent wind damage: When peonies bloom, it is the windy season in the north. Because their flower diameter is generally 15 cm to 25 cm, they are prone to being top-heavy. So after blooming, if strong winds occur, the branches are very easily broken, and strong winds also easily damage the delicate petals, causing a “dry edge” phenomenon. Therefore, during the peony blooming period, they must be placed in a wind-sheltered place, and the flowering branches should also be supported with thin wooden sticks.

2. Sufficient light: Peonies need sufficient light during the blooming period. If light is insufficient, besides the branches being prone to leggy growth and the leaves being small and yellowing, the leaves also cannot carry out photosynthesis normally, so the flowers cannot get enough nutrients. Not only will the flowers produced be small, but the flower color will not be vivid and there will be no fragrance.

3. Appropriate water: Peonies need more water during the blooming period than usual. Although spring temperatures are not high, it is windy and water evaporates relatively quickly, so giving the plant sufficient water is very necessary. According to the author's experience, during this period the potting soil should be kept moist (but not waterlogged). When the potting soil is half dry, it should be watered. On ordinary sunny days with high temperatures and sufficient light, the leaves should also be misted with water, but water must not be sprayed on the flowers, otherwise the flowers are likely to fade earlier.

Blooming-period management methods for peonies

1. Cold protection: In the middle reaches of the Yellow River region, peonies sprout from early February. Because the early spring climate is changeable, they are easily harmed by cold waves and late frost, so special attention must be paid to cold protection. Potted peonies should be moved to a wind-sheltered, sunny place. For peonies planted in the ground, it is best to build a straw shed for cover, or light damp firewood and grass before frost to produce smoke for frost protection.

2. Bud thinning: Peony blooming is similar to fruit trees bearing fruit, and there is also an “on-year and off-year” phenomenon. After buds become visible, appropriate bud thinning should be carried out according to the tree's vigor and the previous year's blooming situation. If there are many buds that year, it can be regarded as an “on year,” and part of the smaller, lower buds should be removed (about one third). Bud thinning should be done earlier rather than later.

3. Pre-bloom foliar topdressing: After peony leaves unfold, because photosynthesis strengthens, the leaves have a certain ability to absorb fertilizer. At this time, 0.1%-0.2% monopotassium phosphate can be used for foliar spraying. If it can be sprayed 2-3 times before blooming, the buds can become fuller and larger, and the flowers can bloom more brightly.

4. Watering: In the north, spring is dry with little rain. In addition to watering once in early March, a thorough watering should also be given before blooming (early April). As the blooming period approaches, watering should be stopped. Do not spray water on the leaves or flowers, otherwise it will shorten the blooming time and make the flowers wither quickly.

5. Shading: Peonies avoid strong wind and harsh sun when blooming. To extend the blooming time, when the buds first open, thin white cloth should be used to shade them (do not use colored cloth or printed cloth). This can extend the blooming period by 4-7 days.

6. Cut off spent flowers: After peonies finish blooming, spent flowers should be cut off in time. This not only avoids a “declining” appearance, but also reduces nutrient consumption. Some single-petaled varieties set seed very easily. If not for hybrid seed collection, their flowers should also be cut off in time.

7. Fertilizing after blooming: Because peonies consume a large amount of nutrients when blooming, pre-bloom foliar topdressing alone is far from enough to replenish them. After blooming, a relatively large amount of fertilizer must be applied to make up for it. It is best to use fully decomposed mixed fertilizer of the three cakes (sesame cake, soybean cake, cottonseed cake or rapeseed cake). The amount of fertilizer should be determined according to the size of the plant. When fertilizing, leave a certain distance from the root crown and apply it in a shallow ring-shaped trench about 15 cm deep. Water thoroughly immediately after application.

8. Leaf disease prevention: After blooming, peonies' resistance to disease weakens, and brown spot disease easily invades. To protect the leaves from disease, after blooming, Bordeaux mixture or 200-fold carbendazim suspension can be sprayed once every 7-10 days, for 2-3 consecutive sprays. In this way, the leaves can suffer less damage throughout the year, allowing photosynthesis to proceed normally and accumulating more nutrients for blooming the following year.