Frequently Asked Questions

Find quick answers to common gardening questions from our experts.

Beginners

What month should I start my seeds indoors?

Most gardeners start seeds indoors 6 to 8 weeks before the last expected frost date, which usually falls between February and April depending on region.

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What seeds are best for starting indoors?

The best seeds to start indoors include:

  • Tomatoes
  • Peppers
  • Eggplant
  • Broccoli
  • Cabbage
  • Lettuce
  • Basil
  • Marigolds

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Flowers

Wie pflege ich Sedum spurium?

Care is simple: give it full sun, gritty well-drained soil, water sparingly only when soil is dry, and skip fertilizer almost entirely.

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Ist Sedum spurium eine mehrjährige Pflanze?

Yes, Sedum spurium is a hardy herbaceous perennial that returns reliably each year in USDA Zones 3-9.

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What is the proper way to deadhead flowers?

Cut or pinch spent blooms just above the first set of healthy leaves or a leaf node, using clean, sharp tools.

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Which flowers should not be deadheaded?

Avoid deadheading these self-seeding or wildlife-supporting plants:

  • Hollyhock (Alcea)
  • Foxglove (Digitalis)
  • Forget-Me-Not (Myosotis)
  • Lobelia
  • Coneflower (Echinacea)
  • Rudbeckia / Black-eyed Susan

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Is Aconitum poisonous to humans?

Yes, aconitum is highly poisonous to humans, with all plant parts containing toxic aconitine alkaloids.

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What is Aconitum used for?

Aconitum is used today mainly as an ornamental garden perennial, while processed forms appear in traditional medicine systems.

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Does Brunnera like sun or shade?

Brunnera prefers dappled to deep shade with protection from afternoon sun to prevent leaf scorch.

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Will Brunnera spread?

Yes, brunnera spreads gradually through creeping rhizomes but remains clump forming and non invasive.

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Where is the best place to plant Epimedium?

Plant epimedium in dappled to part shade under deciduous trees, in well-drained soil enriched with leaf mould or compost.

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What is Epimedium herb used for?

Epimedium is used traditionally for bone health, joint comfort, fatigue, and sexual function, with growing peer-reviewed research support.

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Fruits

What month is best to prune fruit trees?

February through early April is best for most fruit trees during dormancy before bud swell.

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What are the five rules of pruning?

The five core rules of pruning are:

  • Remove the 3 Ds (dead, damaged, diseased wood) first
  • Cut at a 45 degree angle above an outward bud
  • Never remove more than 25% to 30% of canopy in a year
  • Always cut just outside the branch collar
  • Sterilize tools between cuts to prevent disease spread

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How do I take care of my avocado tree?

Give it full sun, well drained soil at pH 6.0 to 6.5, deep but infrequent watering, scaled nitrogen feeding, two to six inches of mulch, and light formative pruning.

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What are common avocado tree problems?

The most common issues are:

  • Phytophthora root rot from overwatering or poor drainage
  • Yellow leaves from nitrogen or iron deficiency
  • Brown crispy leaf tips from salt buildup
  • Heavy fruit drop from heat or water stress
  • Thrips, mites, scale, and persea mite damage
  • Sunburned bark on exposed trunks

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How to care for a potted banana plant?

Use a container at least 18 to 24 inches (46 to 61 centimeters) deep and wide, fill with rich well-draining soil, place in bright direct light, and water when the top inch dries.

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Do banana plants need full sun?

Yes, most banana plants thrive in full sun with 6 or more hours of direct light, though some tolerate partial shade with 2 to 6 hours.

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How long does it take to grow a blood orange?

A blood orange tree typically begins producing fruit within 3 to 5 years from planting, though grafted nursery trees often fruit in 2 to 3 years.

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Is there a blood orange tree?

Yes, the blood orange tree is a real cultivar of Citrus sinensis with red pigmented flesh from anthocyanin compounds.

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Is boysenberry a tree or vine?

Boysenberry is a trailing vine, also called a bramble or cane fruit, that needs trellis support.

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Why is boysenberry so hard to find?

Boysenberries are fragile and bruise easily, which makes them hard to ship fresh. Most are sold frozen or as preserves.

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Gardening Styles

What is a cold frame in gardening?

A cold frame is a bottomless box with a clear sloped lid that captures solar heat to protect plants and extend the growing season by 2 to 4 weeks.

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What are the disadvantages of a cold frame?

Cold frames can overheat fast on sunny days, need daily monitoring, offer limited space, hold only 5 to 10°F above outside, and require ventilation to avoid plant damage.

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What is compost tea?

Compost tea is a liquid made by steeping finished compost in water to extract beneficial microbes and soluble nutrients, then applied to soil or leaves.

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Does compost tea actually work?

Sometimes. One 2025 study found large yield gains, but a 2021 trial found no effect on growth or yield, so results depend on the compost and crop.

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Herbs

Do herb spirals actually work?

Yes, when built correctly. The mound creates real sun, drainage, and moisture differences that suit different herbs.

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What is a spiral herb garden?

A spiral herb garden is a mounded raised bed that coils upward to create several growing zones in a small footprint.

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Landscaping

What are the best evergreen ground cover plants?

Strong choices include creeping juniper, creeping phlox, candytuft, bearberry, Japanese spurge, and creeping thyme, chosen by light, zone, and use.

  • Creeping juniper for sunny slopes
  • Creeping phlox and candytuft for spring color
  • Bearberry for cold, lean soil
  • Japanese spurge for shade
  • Creeping thyme for foot traffic

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What is the best low maintenance ground cover?

The best low maintenance ground cover is one matched to your site, such as creeping juniper in sun or Japanese spurge in shade.

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What makes a good rain garden?

A good rain garden has the right site, tested soil drainage, correct depth for the slope, and deep-rooted native plants.

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What is the difference between a swale and a rain garden?

A swale is a shallow sloped channel that moves water along; a rain garden is a basin that collects and infiltrates it.

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Plant Health

What is the purpose of a garden cloche?

A garden cloche acts as a miniature greenhouse, protecting young plants from frost, wind, pests, and temperature swings while accelerating early-season growth.

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How to make your own garden cloches?

You can build simple cloches from these everyday items:

  • Cut the bottom off a clean plastic milk jug and place it over the seedling.
  • Bend half-inch PVC into hoops over a raised bed and drape 6-mil greenhouse film on top.
  • Invert a clear glass jar or vase over a small plant on cool nights.
  • Build an A-frame with old window panes hinged at the top.

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What are row covers for gardens?

Row covers are lightweight spun-bonded polyester or polypropylene fabrics laid over plants to provide frost protection, pest exclusion, and season extension.

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What is a seed row cover?

A seed row cover is a lightweight fabric placed over freshly seeded beds to retain soil moisture, prevent crusting, and speed germination.

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What is cottonseed meal?

Cottonseed meal is the protein-rich byproduct left after cotton is ginned, the oil is pressed out, and the seeds are crushed. It serves as livestock feed and a slow-release organic fertilizer.

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How is cottonseed meal made?

Cotton is ginned to remove lint, the seeds are often dehulled, then the oil is removed by mechanical pressing or solvent extraction, and the remaining cake is ground into meal.

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Does foliar feeding really work?

It works for correcting confirmed micronutrient deficiencies, but it is not a reliable yield booster or a soil replacement.

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What is the foliar feeding technique?

Foliar feeding sprays a diluted, water based nutrient solution directly onto leaves so a small fraction is absorbed through the cuticle.

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What is kelp fertilizer good for?

Kelp fertilizer is best used as a biostimulant. It supports rooting, transplant recovery, stress tolerance, and disease defense rather than supplying heavy nitrogen.

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What plants benefit most from kelp fertilizer?

Vegetables like tomatoes and peppers, seedlings, strawberries, and stressed transplants respond best, since research shows gains in rooting, growth, and disease defense.

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Plants

Is Sempervivum indoor or outdoor plant?

Sempervivum is primarily an outdoor plant. It thrives best in direct sunlight, fresh air, and cooler temperatures that mimic its native alpine habitat.

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Does Sempervivum like sun or shade?

Sempervivum strongly prefers full sun, ideally six or more hours of direct light daily, though afternoon shade helps in extremely hot climates.

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Which variety of snake plant is best?

Laurentii is widely regarded as the best snake plant variety due to its striking yellow-edged leaves and Royal Horticultural Society Award of Garden Merit.

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How many varieties of snake plants are there?

There are more than 70 species of snake plants, plus hundreds of additional cultivars and hybrids developed through selective breeding.

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What plants should you protect from frost?

Tender annuals, warm-season vegetables like tomatoes and peppers, tropical plants, citrus trees, and young transplants need frost protection.

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Is 2 degrees cold enough for frost?

Yes, 2 degrees Celsius (about 36 degrees Fahrenheit) is within the frost advisory range where ground frost can form on clear, calm nights.

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How do you harden off seedlings fast?

You cannot truly rush hardening off without risk, but the minimum safe window is 5 to 7 days with longer daily exposures.

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How long should you harden off seedlings for?

Most seedlings need 7 to 14 days of gradual outdoor exposure before final transplant.

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What are ground orchids?

Ground orchids are terrestrial orchids that grow rooted in soil rather than on trees. The name mainly covers tender Spathoglottis and hardy Bletilla striata.

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Are ground orchids hard to grow?

No. Ground orchids are among the easiest orchids. A University of Arkansas horticulturist notes the hardy Chinese ground orchid is so easy even novice gardeners can grow it.

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Soil

What is the best way to compost leaves?

Layer leaves with nitrogen-rich greens at a 2-3 to 1 ratio, keep moisture like a damp sponge, and turn every 3 weeks.

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What leaves should not be composted?

Skip these leaves to protect your pile:

  • Black walnut leaves (contain juglone toxin)
  • Eucalyptus leaves (oils slow decomposition)
  • Diseased or fungal-infected leaves
  • Leaves treated with pesticides or herbicides

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How do I test the soil in my garden?

Collect 10 subsamples 7 inches deep across your garden, mix them in a clean bucket, air dry about 1 cup, and mail it to a certified extension lab.

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How much does a soil test cost?

Typical price ranges are:

  • Extension lab basic test: 15 to 30 dollars
  • Independent commercial lab: 30 to 75 dollars
  • Home DIY kit: 10 to 25 dollars
  • Lead-only lab test: 25 to 50 dollars
  • Full contaminant panel: 100 to 250 dollars

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What is AZOMITE fertilizer used for?

Azomite is used to remineralize soil, adding more than 70 trace minerals as a slow-release amendment rather than a main nutrient source.

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Does AZOMITE fertilizer actually work?

Evidence is mixed but real. A Colorado State University pepper trial showed a 68 percent fruit-weight increase, though the effect was cultivar-dependent.

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Is bat guano good fertilizer?

Yes. Bat guano is a proven slow-release organic fertilizer, and controlled crop trials show clear growth and soil gains.

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What is in bat guano fertilizer?

Bat guano contains nitrogen, phosphorus, potassium, trace minerals, and beneficial microbes, with amounts that vary by bat diet.

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What is feather meal?

Feather meal is a high-nitrogen organic fertilizer made from poultry feathers that are heat-treated and ground into a keratin-rich powder.

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How long does it take for feather meal to break down?

Soil microbes release its nitrogen gradually. Research found roughly 45, 55, and 65 percent released after 1, 2, and 8 weeks in warm, moist soil.

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Trees

Which month should you prune grape vines?

Prune in the dormant season, roughly January through early March, before the buds swell.

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How do you prune a grape vine for beginners?

Keep one trunk, select a few strong one-year-old canes, and remove the rest of last year's growth.

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How do you take care of a lime tree?

Give it full sun, well-drained soil, deep but infrequent water, nitrogen feeding from spring to late summer, and cold protection below freezing.

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Do lime trees require a lot of water?

Not constant water. Limes prefer deep, infrequent watering and suffer more from overwatering and root rot than from short dry spells.

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How long does it take a mango tree to bear fruit?

Grafted mango trees usually bear in three to five years, while seed-grown trees can take five to eight years or longer.

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How often should I water a mango tree?

Watering depends on age:

  • Newly planted: every other day the first week, then one to two times weekly
  • Years one to three: about once a week during dry spells
  • Mature trees: only during prolonged spring and summer dry periods

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How do you take care of a plum tree?

Give it full sun, well-drained soil, a pollination partner of the same type, yearly pruning, fruit thinning, and steady watering.

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How long does a plum tree take to fruit?

Most plum trees bear fruit 2 to 5 years after planting, with standard trees often taking 3 to 5 years.

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Vegetables

Can you eat amaranth?

Yes, you can eat both the seeds and leaves of cultivated amaranth species safely when properly prepared.

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What are the benefits of amaranth?

Key amaranth benefits include:

  • High-quality protein with abundant lysine
  • Naturally gluten-free grain alternative
  • Rich in calcium, iron, and magnesium
  • Strong drought and heat tolerance

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Water

Which plants should be bottom watered?

African violets, begonias, seedlings, peace lilies, calatheas, and small succulents benefit most from bottom watering.

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How long should plants sit in water when bottom watering?

Plants should sit in water for 20 to 60 minutes depending on pot size and soil type.

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Wildlife

Why do people put ladybugs in gardens?

Ladybugs are voracious predators of aphids and other soft-bodied pests, so gardeners use them as free, pesticide-free pest control.

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Is it good to buy ladybugs for your garden?

Usually not. Research shows about 95% of released beetles fly away within 48 hours, so attracting native ones works far better.

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What is a good host plant for butterflies?

Native plants that feed caterpillars are best.

  • Milkweed for monarchs
  • Oaks for hairstreaks and many others
  • Violets for fritillaries
  • Parsley, dill, and fennel for black swallowtails

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How many host plants should I plant?

Plant several of each host species, not just one.

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