It's best to sow cucumbers at the beginning of the month. Ideal days: August 2nd–6th, during the Waxing Moon. Plants will grow quickly and fruit well.
When should I transplant flowers in August 2025?+−
Transplant flowers in the second half of the month. Ideal days: August 10th–14th or 17th–20th, when the Moon is waning. Roots establish better during this time.
August marks the final stretch of summer. Days remain warm, but nights grow cooler. In the vegetable garden, crops are ripening, and in the orchard, it's time to harvest apples and plums. But the season isn't over yet! There's still time for sowing, transplanting, plant care, and prepping for fall. To make the most of your efforts, consult the moon calendar gardening guide for August. The Moon influences sap flow, root development, and the growth of leaves and fruits. By aligning your work with its phases, you'll avoid mistakes and save energy.
Moon Phases in August 2025
In August, the Moon goes through all four major phases, each influencing plants differently:
First Quarter — August 1st
Full Moon — August 9th
Last Quarter — August 15th–16th
New Moon — August 22nd–23rd
Next First Quarter — August 30th–31st
Plant behavior by moon phase:
Waxing Moon (New Moon to Full Moon): Ideal for planting upward-growing crops — greens, tomatoes, flowers.
Waning Moon (Full Moon to New Moon): Best for root vegetables, transplanting, fertilizing.
New Moon and Full Moon: Time to rest — avoid planting or sowing for 1–2 days.
What to Sow and Plant – Moon Calendar Gardening for August
Though summer is nearing its end, there's still plenty to do. The lunar calendar for gardening in August recommends focusing on greens:
Dill – Germinates quickly, cold-resistant
Spinach – Ready to harvest in 3 weeks
Arugula – Fragrant and tender, prefers mild warmth
Cress – Sprouts in 3–5 days
Leaf Mustard – Spicy and fast-growing
Parsley – Thrives in cooler temperatures
Best Days to Sow Greens:
2nd–6th (Waxing Moon),
24th–28th (Waxing Moon resumes after New Moon).
Also, don't forget about root vegetables:
Radish – Better to sow now than in July; less bolting
Winter Radish – Ideal for storage and salads
Daikon – Delicate, juicy, prefers short days
Beets – Choose only early varieties when sowing late in the season
Best Days to Sow Root Vegetables:
11th–14th (Waning Moon),
17th–20th (Pre-New Moon).
Transplanting Perennials — Moon Calendar Gardening in August
Late summer is perfect for updating perennial beds. The August moon calendar gardening recommends transplanting these:
Strawberries – Transplant or plant new runners by mid-August to ensure rooting before fall
Sorrel and Rhubarb – Divide and replant established clumps
Welsh Onion, Shallots – Plant now for early spring greens
Green Manure Crops — Moon Calendar for August Gardening
Late summer is ideal for sowing green manure crops (cover crops). These enrich the soil, suppress weeds, and add nitrogen.
Recommended Green Manure Crops:
Mustard
Phacelia
Lupin
Oats
Rapeseed
Sow on beds vacated after harvesting early crops like potatoes, cucumbers, peas, or early cabbage.
Best Days for Sowing Green Manure:
2nd–6th (Vigorous growth),
24th–28th (New lunar cycle begins).
Garden Work — August Lunar Calendar for Gardening
At summer's end, the garden needs extra care. The moon calendar gardening guide for August highlights key seasonal tasks:
Pruning:
Raspberries – Remove old canes after fruiting
Currants & Gooseberries – Shape shrubs by cutting weak branches
Apples & Pears – Lightly thin crowns, remove dry branches
Best Days for Pruning: 15th–20th (Waning Moon — less sap flow = less stress)
After fruiting, trees and shrubs are exhausted and need support:
Phosphorus-Potassium Fertilizers – Help prepare for winter
Wood Ash – Natural potassium source
Compost – Spread in tree circles
Avoid nitrogen in August — it promotes growth when plants need to rest.
Best Days for Fertilizing: 9th–12th (Full Moon and after — high sap activity = better nutrient absorption)
Late summer brings outbreaks of fungus and caterpillars. Watch for:
Codling moth (apples)
Powdery mildew
Rot on grapes, plums, tomatoes
Use biological treatments (infusions, ash, whey) or permitted fungicides. Remove infected fruits — don't leave them on the ground.
Best Days for Treatment: 13th–18th (Waning Moon — pest control is most effective)
Harvesting — Moon Calendar Gardening for August 2025
August is the most bountiful month. Gardens and orchards are full of ripe produce — it's important to harvest at the right time.
What to Harvest in August:
Tomatoes, cucumbers, peppers – Harvest frequently to encourage new growth
Onions and garlic – Dig when tops start to dry
Potatoes – Harvest as they mature, especially after vines die down
Zucchini, eggplant, pumpkins – Pick regularly before they overripen
Apples, pears, plums – Harvest in the morning or evening when it's cool
Best Days for Harvesting:
9th–13th (Full Moon and after — juices are concentrated),
29th–31st (Waxing Moon — fruits are sweet and juicy).
Late August is peak season for home preserving. Popular items:
Cucumbers – Pickled or fermented
Tomatoes – Juice, ajika, lecho
Peppers – Frozen or stuffed
Zucchini – Purees, frozen slices
Fruits & Berries – Jam, preserves, compotes
Herbs – Dried or frozen
Best Days for Preserving:
8th–13th (Full Moon and waning phase — flavor and juice are highest),
27th–31st (New lunar cycle boosts flavor accumulation).
Conclusion
Late summer is a busy time in the garden, but with the moon calendar gardening guide for August, everything can be done efficiently and at the right time. The key is to stay attuned to nature, work in harmony with the Moon's rhythm — and don't forget to rest! That's how your garden will reward you with an abundant harvest.
Sow dill during the Waxing Moon — best dates are August 2nd–6th and 24th–28th. It will yield fragrant, lush greenery.
When should I harvest carrots in August 2025?+−
Harvest carrots during the Waning Moon. Ideal days: August 13th–20th. Roots store better when lifted in this phase.