467 useful answers · Page 19 of 20

Gardening: page 19

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Do I need to keep a home cranberry bed permanently flooded?

No. The familiar flooded-harvest photographs do not describe the plant's everyday growing conditions. Cranberries need an acidic, consistently moist but aerated root environment; prolonged saturation deprives roots of oxygen. Assess drainage and soil acidity before planting instead of creating a small pond. A garden bed needs an appropriate growing medium and dependable moisture, and its suitability depends on local conditions as well as the cranberry variety.

Why has my parsnip row not emerged when other seedlings are already growing?

Parsnips can take two to four weeks to germinate, especially in cool conditions, and old seed is unreliable. Use fresh seed, sow when the soil has warmed and keep the seedbed moist while waiting. Mark the row so you do not accidentally hoe it away. A slower start is not automatically failure, but repeatedly sowing an old packet into cold soil is unlikely to solve poor emergence.

Must I lift all my parsnips before the first frost?

Established parsnip roots are hardy and can remain in the ground for later harvest; frost can improve their sweetness. Mark the row before the foliage disappears and lift roots carefully with a fork. Frozen soil can make digging difficult, so harvest some in advance of severe cold or insulate the row as appropriate locally. Distinguish leaving a known cultivated crop in place from trying to identify unknown wild roots.

Why should young celeriac stay warm even though mature plants tolerate winter cold?

Seedlings exposed to cold can be encouraged to flower prematurely later, before producing the swollen stem you want. Start them early under protection, keep young plants above about 10°C or 50°F, and delay outdoor planting until conditions are suitable. Harden them off gradually. Mature crop hardiness and seedling requirements are different, so do not use a winter-harvest photograph as a guide to planting tender young celeriac in cold spring weather.

Should I heap soil or mulch over the swelling crown of celeriac?

No. Set the young plant with its stem base at soil level and keep mulch from burying the crown. As it develops, remove outer leaves gradually when they lie horizontally, exposing the swelling area without stripping away all healthy foliage. Maintain consistent moisture in the surrounding soil. Celeriac is grown for its enlarged stem, so do not treat it like a crop that needs that part covered with soil.

How do I stop tall Brussels sprout plants rocking loose in autumn wind?

Firmly established plants may still need additional support as they become top-heavy. Mound soil around the stem base in late summer and stake taller plants in exposed positions with a sturdy support. Check that ties support without cutting into the stem. Wind rocking can loosen roots and hinder growth, so act before a storm rather than waiting until the crop leans. Leave adequate room and airflow between plants.

How deeply should I transplant a young Brussels sprout plant?

Set a healthy young plant deeper than it stood before, with its lowest leaves at the soil surface, then firm it in and water thoroughly. This helps it establish a secure root system for the tall crop ahead. Harden off plants raised indoors first and handle roots carefully. Give plants their full recommended spacing as well; deeper planting does not compensate for crowding a large brassica into a small gap.

Should I pack soil tightly into the hole around a newly transplanted leek?

With the traditional dibbed-hole method, stand the prepared young leek in its hole and fill the hole with water to settle soil around the roots. You do not need to backfill it immediately. This method helps develop the long pale shank. Use healthy, hardened-off plants of suitable size and prepared ground, following the spacing for the variety rather than forcing many thin seedlings into one crowded hole.

Can I use any leek variety for both summer baby leeks and a long winter harvest?

Check the variety's intended season and hardiness. Some are bred for early or baby harvests, while others stand well through winter and into spring. Choosing a range can spread the harvest, but leaving a summer type indefinitely is not the same as planting a winter-hardy cultivar. Read the sowing and maturity guidance before buying, then match spacing and harvest size to the crop you actually want.

Can I use ordinary fertilized potting mix for plants that will sit underwater?

Use a planting medium intended for aquatics, or suitable medium-to-heavy loam free of added fertilizer and herbicide. General potting mixes can release nutrients into the pond and may float or disperse. Choose a proper aquatic basket and plant at the species' recommended soil depth before lowering it to the appropriate water depth. The goal is stable rooting without turning the surrounding water into a nutrient-rich suspension.

Can any waterlily fit a small garden pond if I keep it in a basket?

No. Waterlilies differ greatly in eventual spread and required water depth. Choose a compact cultivar suited to the actual pond dimensions; a basket does not make a vigorous large variety miniature. Measure the planting location before buying and check the label's depth guidance. Matching the plant to the space reduces repeated cutting and lifting and gives it a better chance of producing a balanced display.

Why should I keep newly bought pond plants separate before adding them to my pond?

They can carry small pieces of unwanted aquatic plants that are difficult to notice at purchase. Quarantine new plants for a few weeks and inspect them before introduction, following the supplier's care guidance. This is especially useful because a tiny contaminant can establish and spread after release. Choose locally appropriate plants and keep discarded material out of streams and natural water bodies rather than tipping pond contents outside.

How can small wildlife get safely into and out of an above-ground container pond?

Provide a stable route up the outside and a gently sloping route from the water to the rim inside. A steep smooth container wall alone offers poor access, especially when the water level drops. Arrange firm, textured materials so they cannot roll or collapse onto creatures. Plan access before filling and planting the container, and check it again as plants grow and seasonal water levels change.

Should I add frogspawn or a bucket of water from another pond to start wildlife in a new pond?

Let wildlife colonize naturally instead. Transferring spawn, sediment, plants or water between ponds can also transfer diseases and unwanted species. Create suitable planting and access, then give the pond time; mobile insects may arrive surprisingly quickly. Avoid collecting animals from wild sites or treating a wildlife pond like a tank that must be stocked. A healthy habitat can develop without moving its future residents yourself.

Is green pond water the same problem as long strands of blanket weed?

Both involve algae, but the visible growth differs. Suspended microscopic algae can make the water look like green soup, while blanket weed forms thread-like masses you can often lift out. Identify which you have before choosing a response. Some algae are a normal part of the habitat, so the practical aim is managing excess growth and its causes rather than making every pond completely sterile and colorless.

Will emptying and refilling my pond permanently solve an algae problem?

Usually not, because the conditions favoring algae can remain. Excess nutrients and strong sunlight with little plant cover encourage growth, so review those causes rather than repeatedly replacing all the water. Suitable planting and partial shade can help create a better balance. Remove only excessive growth with care for pond life. A temporary clear appearance after refilling does not show that the underlying problem has been resolved.

What does prepared mean on a packet of hyacinth bulbs?

Prepared bulbs have received a special temperature treatment to encourage an earlier indoor display, often around winter holidays when planted on schedule. Ordinary bulbs of the same cultivar are intended for normal spring flowering. Follow the packet's planting and rooting instructions rather than assuming the word means a bulb is ready for immediate warm-room flowering. Choose by the display date you want as well as the flower color.

Can I keep a hyacinth after its indoor flowers fade?

Yes. Remove the spent flower stalk while allowing the leaves to keep growing, and continue appropriate watering and feeding until the foliage yellows. A sheltered outdoor position or later planting in suitable garden soil can let the bulb recover. Future flower spikes may be smaller and looser than the original commercially prepared display. Do not cut off healthy foliage merely because the decorative indoor flowering period is over.

How do I divide snowdrops while they are still in leaf after flowering?

Lift a clump carefully while the soil is moist and tease the bulbs apart with minimal root damage. Replant promptly at their previous depth, using the change from white to green on the stem as a guide, and water them in. Keep small seedlings with a little cluster if separating them individually would damage them. This after-flowering method is called dividing in the green; do not strip the leaves off first.

Why do some lily bulbs need a deeper container than others?

Some lilies form roots on the stem above the bulb as well as underneath it, so they need room for that rooting zone. Others root primarily from the bulb's base. Check the species or cultivar's planting guidance rather than using one depth for every lily. A deep, well-drained container makes it easier to provide the required cover without crowding the roots against the bottom of a shallow decorative pot.

Do all potted lilies need an acidic ericaceous potting mix?

No. Many grow in a suitable general potting mix, but lime-sensitive species such as Lilium auratum and Lilium speciosum need an acidic medium. Check the exact lily rather than buying a mix based only on the common name. Good drainage and suitable feeding still matter whichever medium you use. Choosing an acid mix for one plant does not establish that every lily in a mixed collection has the same soil requirements.

Why can a small plastic greenhouse overheat even when the outdoor air feels cool?

Its small volume of air can change temperature quickly, and limited ventilation can trap heat from sunshine. Open the appropriate vents or cover as conditions require and monitor the temperature where the plants sit. A larger greenhouse buffers those changes more effectively. When choosing a mini-greenhouse, consider adjustable ventilation and a sheltered position as well as how many pots the shelves can hold.

Does an unheated cold frame keep tender plants safe through any winter freeze?

No. It offers shelter and some protection from mild frost, but it is not equivalent to a heated greenhouse. Match the plants to the conditions it can actually maintain and check temperatures during cold spells. Added insulation can reduce heat loss but also restrict light and ventilation. Secure lightweight frames against wind, and have an appropriate protected location for plants that cannot tolerate the forecast cold.

Source checks for these answers: September 23, 2026. Product instructions and local requirements can vary.